GPM-300 technical manual
Broadcast Devices, Inc.
GPM-300 General Purpose Audio Matrix
*Digital/Analog Audio Switcher
Operations Quick Start Guide
Broadcast Devices, Inc.
Tel. (914) 737-5032
Fax. (914) 736-6916
World Wide Web: www.Broadcast-Devices.com
Firmware Version 2.0.36 and higher
Rev E1. 02/15
*Option Dependent
Table of Contents
I.
Basic Description
3
II.
GPM-300 Operational Description
3-5
III.
Remote Control Operation
6
IV.
Input Mode Selection Menu System
7-9
V.
Silence Sensor Interval Programming
10-11
VI.
GPM-300 Operational Modes
11-12
VII.
GPM-300 Auxiliary Programming Functions
13-14
VIII.
Audio I/O Connector Diagrams
15-16
IX.
Remote Control Connector Diagrams
17-22
XI.
GPM-300 Block Diagram
23
XII.
Frame Rate Conversion Switch Selection
24
XIII. Specifications
25
XIV.
26
Warranty
2
I. Basic Description
The GPM-300 - can be ordered for four or eight inputs. The inputs can be AES3 digital
and/or analog depending on model. Please refer to the model designation chart below.
It is also possible to configure the GPM-300 for composite baseband FM stereo input.
See models GPM-300-9,10 for configuration possibilities.
GPM-300- 1, 4 - AES I/O
GPM-300-6, 8 – AES I/O
GPM-300- 2, 8 – AES I/O
GPM-300-7, 8 – L/R In, 4 – L/R Out
GPM-300- 3, 4 - AES I/O, 4 L/R Input GPM-300-8, 8 – L/R I/O
GPM-300- 4, 4 – 4 L/R I/O
GPM-300-9, 4 AES I/O, 4 Comp. I/O
GPM-300- 5, 4 – AES I/O, 4 L/R I/O
GPM-300-10, 4 – Comp. I/O, 4 L/R I/O
Summary of Basic Switcher Functionality:
The GPM-300 General Purpose Matrix Switcher system provides up to 8 inputs
which can be selected to any of 8 outputs.
Each input have A and B input memories which can be programmed from the
front panel providing versatile “Switcher within a Switcher” functionality.
Remote Control Functionality:
Individual remote control of A/B input selection to each output via GPIO
4 X 4/8 X 8 router functions from front panel or with the optional GPMRC Remote
Control/RS485 serial interface panel provides simple remote pushbutton control
of input routing to any output with status.
Audio Format I/O:
AES I/O, analog L/R I/O or hybrid versions available – provides format
conversion in addition to switching functions
3
II. GPM-300 - Operational Description
When power is first applied to the GPM-300 after approximately 5 seconds the unit
display should be as shown below. The top row indicates “Output” channel and the
bottom row shows which “Input” channel is being fed to the output directly above.
OUTPUT 1 - 8
Auto/Manual Indicator
M O: 1 2 3 4 5 6 7 8
L
I: 1 1 1 1 1 1 1 1
INPUT 1 - 8
If no audio is being fed to the unit on any channel the numbers in the lower half of the
display will be inverted indicating no audio present. After 5 seconds of audio application
on a given channel above threshold the respective lower channel indicator will become
un-inverted indicating audio present above the on the channel.
To select an input to an output review this example:
Suppose it is desired to route input #3 to output #5
1. If the unit is in Auto Mode place it in manual mode by pressing the F1/F5 button
once. The letter M for manual operation will be displayed as the first character of
the display row.
2. Select output #5 by moving the <> keys until the blinking cursor in the lower half
of the display is under output #5.
3. Use the ^ v keys to select input #3
4. Once input #3 is selected press the Green Check Mark key to make the
selection. Selection of the channel only happens after the Green Check Mark key
is depressed. If not the cursor will continue to blink until the Green Check Mark
key is pressed or the Red X key is pressed to cancel the selection. You can
check to see if audio is present on a channel before actually switching to it by
observing the input number condition as described above.
4
OUTPUT 5 has input 3 selected
Auto/Manual Indicator
M O: 1 2 3 4 5 6 7 8
L
I: 1 1 1 1 3 1 1 1
INPUT 3 is selected
Arrow Keys
Green Check Mark Key
F1/F5 F2/F6 F3/F7 F4/F8
Red X Key
The GPM-300 has an additional feature whereby the user can assign a set of A/B inputs
to each output thus creating a set of 4 or 8 A/B switchers in addition to being able to
switch any input to any output. This additional feature was created for situations where
a shared source amongst many outputs could be accommodated. Examples include
EAS generator/receiver sharing, network feed sharing, or for simply providing a number
of A/B switchers in one compact chassis. Cross point router operation is separate from
the A/B channel selection function described below. Because the GPM-300 is a
versatile switcher it can be used for different applications where different functionality is
required.
Configuring the “A” and “B” channels to be selected by remote inputs:
To enter the A/B CONFIG MENU press the F2/F6 key. The display will switch as shown
below:
A/ B CONFI G OUTPUT: 1
A I N: 1
B I N: 4
Pressing the <> Keys selects the OUPUT for which the user would like to view in order
to change the A/B channel selections for that output.
Pushing the F2/F6 Key will alternately select the A IN or B IN for modification. The
currently selected field will blink to indicate which field is to be modified.
5
Pushing the ^ v keys will allow the user to alter which channel will be selected by the A
and B levels of the channel select input pin for that respective output.
Here is an example to illustrate how this all works. Let us assume that it is desired that
for OUTPUT #3 the user wants INPUT #2 to be the A input and INPUT # 3 to be the B
input.
1. Select the A/B configuration menu by pressing F2/F6 if not already done.
2. Use the <> keys to navigate to OUTPUT #3 – Look at OUTPUT: indicator in
upper Right Hand corner of display.
3. The A input indicator will indicate the present channel input selected and should
be flashing. Use the ^ v keys to navigate to INPUT #2 which is desired in this
example.
4. Press F2/F6 once to move the blinking cursor to the B IN: indicator. Use the ^ v
keys to select the desired B input. In this example it is INPUT #3.
5. Review your settings and then exit the A/B CONFIG Menu by pressing F1/F5
once.
Once this action is performed for output #3, INPUT #2 will be selected when
command A is selected from the GPIO remote for OUTPUT #3 and INPUT #3 will be
selected when command A is selected remotely for OUTPUT #3.
Note: Settings are dynamic and are immediately stored in non-volatile
memory. Be sure that settings are correct before exiting the A/B CONFIG
Menu or moving to another output channel.
III. REMOTE CONTROLLED OPERATION
The GPM-300 provides rear panel parallel remote control to select between A/B inputs
for each output and to enable/disable remote operation. Open collector status outputs
are provided to indicate the currently selected input channel for each output channel.
These outputs are capable of sinking up to 100ma and are rated at a maximum of 30v
DC. The chart below shows which GPIO 1-2 outputs are assigned to which A/B inputs
for a designated output channel.
GPIO 1
GPO 1
GPO 2
GPO 3
OUTPUT 1
A
GPO 4
GPO 5
OUTPUT 2
B
A
GPO 6
GPO 7
OUTPUT 3
B
A
6
GPO 8
OUTPUT 4
B
A
B
GPIO 2
GPO 1
GPO 2
GPO 3
OUTPUT 5
A
GPO 4
GPO 5
OUTPUT 6
B
A
GPO 6
GPO 7
OUTPUT 7
B
A
GPO 8
OUTPUT 8
B
A
B
Remote Channel Selection:
The GPM-300 provides 8 sets of A and B channel selection inputs and 8 channel status
outputs on a pair of remote control DB-25 connectors. Each output channel (1-8) is
controlled via its respective A/B channel select pin (GPI 1-8) and provides a status
output (GPO 1-8) which reflects whether the A or B input channel for that output is
currently selected. Each of the 8 outputs has a pair of status indicators to indicate
whether that channel’s respective “A” or “B” channel is selected. The status outputs of
the GPM-300 are pulled up to 5 VDC and go low to indicate the status is active. Refer to
section VI. Remote Control connections for further connection information.
Note: A common use of the GPM-300 is as a master A/B switcher for multiple inputs.
This is particularly useful for AES audio applications as a maximum of two sets of 4
AES3 inputs can be selected to their respective outputs. This application provides one
button remote control of all inputs by simply setting the input mode selections as
follows:
(A)AES 1-4 (B) AES 5-8
1
2
3
4
1
2
3
4
Output
5
6
7
8
5
6
7
8
1
2
3
4
5
6
7
8
Programming the unit using the above chart allows all inputs to the AES 1-4 inputs to be
“A” inputs and all inputs to the AES 5-8 inputs to be “B” inputs. To have one button
control of all “A” and “B” inputs strap all A input select command lines and all B input
select command lines together. Momentary connection to common of these lines will
cause all A inputs to be selected together and all B inputs to be selected together.
7
IV. Input Mode Selection Menu Operation
The GPM-300 input pairs can be configured for mode of operation on an individual
basis. Stereo, Mono Left, Mono Right, L+R and Stereo Swap can be configured from
the front panel for both AES and analog inputs. Use mono left and mono right to fill in a
missing channel. For example; choosing mono left will take a signal only input on the
left channel and apply it to both channels at the output of the unit. Use L+R to create a
monaural input from a stereo source.
I NPUT M ODE SELECTI ON
I NPUT 1 :
STEREO
To select the input mode press F4/F8 once. The display will indicate that you are in the
INPUT MODE SELECTION menu as shown above. Select the input channel pair (1-8)
using the ^ v keys. The <> arrow keys are then used to select between the following
modes:
Stereo - Factory Default
LR Swap - L/R Channels Swapped
Mono L - L input fed to both L & R outputs
Mono R - R input fed to both L & R outputs
L + R - L & R inputs are summed and fed to both L & R outputs.
OFF – turns channel off – use this on unused channels
Here is an example to illustrate the procedure. Suppose a user decides that INPUT #4
should be L ONLY because a particular network feed is fed to only the left channel and
it is desired to have the audio for this feed appear on both left and right outputs. To do
this the GPM-300 Mono L function can be used to apply the left channel audio to both
output channels by the following procedure:
1. Press F4 once to enter Input Mode Selection from Main Menu
I NPUT M ODE SELECTI ON
I NPUT 1 :
STEREO
2. Pressing the ^ v keys to select the input #4 channel to be changed:
I NPUT M ODE SELECTI ON
I NPUT 4 :
STEREO
8
2. Pressing the <> arrow buttons until MONO L is displayed as shown below:
I NPUT M ODE SELECTI ON
I NPUT 4 :
M ONO L
3. The input mode is dynamically saved when selected. To exit this menu
press the F1 key to return to the main menu:
M O: 1 2 3 4 5 6 7 8
L
I: 1 1 1 1 1 1 1 1
Phase Inversion Control
The GPM-300 allows the user to invert the phase (Tip/Ring Inversion) of any channel to
correct for inadvertent phase inversion. To perform phase inversion:
1. Press F4/F8 twice Input Invert Control from Main Menu – Phase Inversion:
I NPUT I NVERT CONTROL
I NPUT 1 :
NORM AL
2. Pressing the ^ v keys allows you to select the input channel to be changed:
3. Pressing the <> keys allows selection of the following input modes:
Normal
Invert Left
Invert Right
Note: Phase inversion is Left or right but not both simultaneously.
Input Invert Control modes are dynamically saved when selected. To exit this menu
press the F1 key to return to the main menu.
9
Input/Output Gain Control
Press F4 three times to enter Input Gain Control menu – from Main Menu
I NPUT GAI N CONTROL
I NPUT 1 :
0 dB
Pressing the ^ v keys allows you to select the input channel to be changed:
Pressing the <> keys allows you to adjust gain in one dB increments +/- 10 dB
Press F4 four times and the display will indicate Output Gain Control
OUTPUT GAI N CONTROL
I NPUT 1 :
0 dB
Pushing the ^ v keys allows you to select the output channel to be changed:
Pushing the <> keys allows you to adjust gain in one dB increments +/- 10 dB
Factory default for input and output gain controls is 0 dB. When factory default gains are
used AES3 I/O is unity. When AES3 inputs are output to an analog channel the analog
output will correspond to –20 dB nominal below full scale of AES3 input or + 4dBm
analog balanced output. Analog L/R inputs are designed to accept a +4 dBm nominal
input which will produce + 4 dBm output to an analog output and – 20 dBfs for an AES3
output.
V. Silence Interval Programming
The GPM-300 has the ability to detect and switch upon silence from the active A or B
input of each output.
AUDI O LOSS TI M EOUT
SECONDS = 6 0
Pressing the F3/F6 Key will allow programming the silence interval with the display as
shown above. Select the desired interval using the ^ v keys. The interval can be set to
any time between 10 and 600 seconds (Default = 60 seconds). Pushing the ENTER key
will put this setting into non-volatile memory. Pushing the red X key will return to the
original value before it was changed. NOTE: the ENTER key MUST be pushed to retain
this setting after power is cycled. This allows the user to test a setting before
committing it to memory.
10
Note about silence interval: Customers have requested as a little as 10 seconds as a
silence interval and we have therefore provided this capability in the GPM-300. Be
careful in choosing a short duration silence interval because it is often the case that
while many program directors believe 10 seconds is an eternity it can be just a few too
many steps back to the control room for the overnight guy out for a smoke. The
overnight guy will never tell you he was out of the studio for a smoke that long but the
silence sensor will keep him honest! Now that we have cleared the air on this here is
the procedure:
Silence Threshold Programming
OUTPUT LVL = -20 dBFS
SILENCE LVL = -55 dBFS
Pressing the F3/F6 Key twice from the main menu will allow programming of the silence
threshold level. The upper line of the LCD indicates the level of the input currently
routed to output #1 for comparison purposes. The lower line indicates the current
threshold below which a channel will be considered INACTIVE. The relative level can be
set to any time between -30 to -55dbFS (default= - 55dbFS) using the ^ v keys. Pushing
the ENTER Green Check Mark key will put this setting into non-volatile memory.
Pushing the Red X key will return to the original value before it was changed. NOTE:
the ENTER Green Check Mark key MUST be pushed to retain this setting after power is
cycled. This allows the user to test a setting before committing it to memory.
VI. GPM-300 Operational Modes
GPM-300 Auto Mode
Pushing the F1/F4 key will alternate between the manual and auto modes. In auto mode
the display will indicate Outputs 1-8 on the top line and the currently selected channel
for each of the eight outputs and its activity status. If audio is active on the selected
channel the number will appear normally. If the channel goes silent for at least 5
seconds the number selected will invert to a black background indicating silence on the
channel.
A
O: 1 2 3 4 5 6 7 8
L
I: 1 1 1 1 1 1 1 1
11
GPM-300 Auto Mode with Auto Return Feature
The GPM-300 silence sensor is an intelligent device in that it can not only detect silence
and switch to an alternate channel it then has the ability to monitor the failed channel to
determine audio restoration. In the “Auto Return” mode the GPM-300 can revert back to
the primary channel if audio has been restored for a pre determined time interval.
By pressing the F3/F7 button three times from the main menu the display will be
indicated as shown below.
AUTO RETURN FUNCTI ON
M I NUTES = 1
To adjust the auto return time use the ^ v keys to adjust in increments of minutes from 1
to 60. The factory default setting is “Auto Return Disabled”. If auto return is not desired
leave the unit in the AUTO RETURN DISABLED mode.
If auto return is activated and the unit placed in the auto mode, the display will indicate a
+ sign next to the A in the upper left hand corner of the screen indicating that the unit is
in auto mode and auto return is activated. See the display figure below.
A+
L
O: 1 2 3 4 5 6 7 8
I: 1 1 1 1 1 1 1 1
GPM-300 Auto Mode With Auto Return Function Enabled Display
GPM-300 Manual Mode
The GPM-300 can be operated in the manual mode as a routing switcher as discussed
earlier or as a multiple A/B switcher. In the manual mode channel navigation and
switching can be performed from the front panel, GPIO rear panel interface, and serially
by use of the optional GPMRC Remote Control Interface panel. The GPIO control is
limited to selecting the pre programmed A/B inputs for each output. The front panel
control and by use of the GPMRC panel allows 4 X 4/ 8 X 8 routing. The GPM-300 can
also be controlled through an RS232 connection to the Sage Endec and Digital Alert
Systems DASDEC EAS encoders. See pages 22 and 23 for ser up information. Note
that as supplied by the factory the GPM series switchers are designed to be directly
connected to the GPMRC Remote Control Interface Panel which utilizes RS485
communications. When connected to the rear panel “Serial” connector the interface will
connect directly. If it is desired to use the GPM-300 for use with the Sage and Digital
Alert Systems products the procedure outlined on page must be performed to convert
12
the rear panel “Serial” connector to RS232 communications.
M O: 1 2 3 4 5 6 7 8
L
I: 1 1 1 1 3 1 1 1
GPM-300 Manual Mode Display
VII. GPM-300 Auxiliary Programming Functions
GPM-300 Audible Alarm
The GPM-300 has an audible alarm feature which can be programmed from the front
panel. The Audible alarm will sound after a silence detection sequence has occurred. A
sonalert within the unit will sound until the unit is reset either remotely or from the front
panel. This feature can be turned on or off with the following procedure:
1. Enter AUDIBLE ALARM CONFIG screen by pressing F3/F7 four times from the
main screen as shown below.
AUDI BLE ALARM CONFI G
ENABLED
2. To disable the audible alarm use the v key to select “DISABLED”
3. To enable the audible alarm use the ^ key to select “ENABLED”
GPM-300 Auxiliary Alarm Relay Function and Remote Enable
The GPM-300 has two sets of form C contact relays available on the remote control
enable/FLT reset connector. K1 is a maintained closure relay and K2 can be
programmed to be maintained or momentary in its action. Both relays are activated by a
silence alarm detection sequence. K1 is normally connected to a status input on a
remote control system to indicate a fault has occurred. K2 can be used for this function
in the maintained mode but can also be used as a remote start for an auxiliary audio
source in case of failure of remote link audio. For example, a CD/DVD player or remote
server can act as an auxiliary audio source and K2 programmed for momentary closure
can be used to start such an auxiliary source connected to a GPM-300 input.
Factory default for K2 is MOMENTARY CLOSURE. To change this to MAINTAINED
CLOSURE follow the procedure outlined below.
13
1. Enter the AUX RELAY CONFIG Menu by pressing the F3/F7 key 5 times from
the main display screen as shown below
AUX RELAY CONFI G
M OM ENTARY CLOSURE
2. Use the v key to change to MAINTAINED CLOSURE. The display will indicate
the new relay configuration information as shown below.
AUX RELAY CONFI G
M AI NTAI NED CLOSURE
3. Remote enable is displayed as shown below and is accomplished by connecting
pins 8 and 21 of the rear panel FLT ST/RC EN connector.
A O: 1 2 3 4 5 6 7 8
R I: 1 2 3 4 5 6 7 8
The R in the lower left hand corner indicates that the remote is enabled. Without this
connection the GPIO remote control is disabled and the R is replaced by an L to
indicate local control. The RS232 remote control is always enabled regardless of this
connection.
GPM-300 Factory Default Recovery
As with any programmable device, it is possible that the user would like to quickly return
to the “factory default” settings. To return the GPM-300 to its factory configuration
remove AC power to the unit. While holding the red “X” key, restore AC power until the
display indicates “FACTORY DEFAULT”. The default condition is such that “A” and “B”
inputs are 1 and 4 respectively.
14
VIII. Audio I/O Connections
GPM-300 Audio Connections
DIGITAL AUDIO I/O
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
AESOUTP4
AESOUTN4
CH4 OUT
AESINP4
AESINN4
CH4 IN
AESOUTP3
AESOUTN3
CH3 OUT
AESINP3
AESINN3
CH3 IN
AESOUTP2
AESOUTN2
CH2 OUT
AESINP2
AESINN2
CH2 IN
AESOUTP1
AESOUTN1
CH1 OUT
AESINP1
AESINN1
CH1 IN
DB-25
ANALOG AUDIO - INPUT & OUTPUT PINOUTS ARE IDENTICAL
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
CH8P
CH8N
CH8 RIGHT
CH7P
CH7N
CH8 LEFT
CH6P
CH6N
CH 7 RIGHT
CH5P
CH5N
CH 7 LEFT
CH4P
CH4N
CH 6 RIGHT'
CH3P
CH3N
CH 6 LEFT
CH2P
CH2N
CH5 RIGHT
CH1P
CH1N
CH5 LEFT
DB-25
15
GPM-300 AUDIO INPUT MAPPING DUAL DIGITAL VERSION
INPUT CHANNEL
1
2
3
4
5
6
7
8
TYPE
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
LOCATION
AES 1
AES 2
AES 3
AES 4
AES 5
AES 6
AES 7
AES 8
GPM-300 AUDIO INPUT MAPPING HYBRID ANALOG/DIGITAL VERSION
INPUT CHANNEL
1
2
3
4
5
TYPE
DIGITAL
DIGITAL
DIGITAL
DIGITAL
ANALOG
6
ANALOG
7
ANALOG
8
ANALOG
LOCATION
AES 1
AES 2
AES 3
AES 4
ANALOG IN 1-2 (L/R) Or
Composite
ANALOG IN 3-4 (L/R) Or
Composite
ANALOG IN 5-6 (L/R) Or
Composite
ANALOG IN 7-8 (L/R) Composite
Note that GPM-300-9 units supplied with a composite I/O board take the place of the
analog input/Output. So for example, inputs 5-8 are designated as composite input 1-4 on
the DIP composite interface panel supplied with the unit. When a composite input is
selected it appears as a buffered output on the respective composite output as well for loop
through capability if desired to feed to an analog composite input to an FM exciter and/or
STL transmitter. Of course a composite input can be routed to an AES3 output of the unit
simultaneously.
16
IX. Remote Control Connections
GPM-300 Remote Connections
NOTE: IF AN INPUT OTHER THAN THE A/B CHANNEL IS SELECTED FROM THE FRONT PANEL NO STATUS OUTPUT WILL BE ACTIVE FOR THAT AUDIO OUTPUT CHANNEL.
GPIO 1
RC/EN/FLT STATUS
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
+12V
CHASSIS
A INPUT SELECT - OUTPUT 1
A CH STATUS OUT - OUTPUT 1
B INPUT SELECT - OUTPUT 1
B CH STATUS OUT - OUTPUT 1
A INPUT SELECT - OUTPUT 2
A CH STATUS OUT - OUTPUT 2
B INPUT SELECT - OUTPUT 2
B CH STATUS OUT - OUTPUT 2
A INPUT SELECT - OUTPUT 3
A CH STATUS OUT - OUTPUT 3
B INPUT SELECT - OUTPUT 3
B CH STATUS OUT - OUTPUT 3
A INPUT SELECT - OUTPUT 4
A CH STATUS OUT - OUTPUT 4
B INPUT SELECT - OUTPUT 4
B CH STATUS OUT - OUTPUT 4
DB-25 MALE (USER SUPPLIED)
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
K1-COM
K1-NC
K1-NO
K2-COM
K2-NC
K2-NO
FAULT DETECTED RELAYS
AUTO
AUTO-COM
MANUAL
MANUAL-COM
REMOTE ENABLE
REMOTE ENABLE COM
FAULT RESET
FAULT RESET COM
AUTO MODE STATUS
REMOTE INPUTS
CHASSIS
DB-25 MALE (USER SUPPLIED)
GPIO 2
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
INPUT COM
+12V
CHASSIS
A INPUT SELECT - OUTPUT 5
A CH STATUS OUT - OUTPUT 5
B INPUT SELECT - OUTPUT 5
B CH STATUS OUT - OUTPUT 5
A INPUT SELECT - OUTPUT 6
A CH STATUS OUT - OUTPUT 6
B INPUT SELECT - OUTPUT 6
B CH STATUS OUT - OUTPUT 6
A INPUT SELECT - OUTPUT 7
A CH STATUS OUT - OUTPUT 7
B INPUT SELECT - OUTPUT 7
B CH STATUS OUT - OUTPUT 7
A INPUT SELECT - OUTPUT 8
A CH STATUS OUT - OUTPUT 8
B INPUT SELECT - OUTPUT 8
B CH STATUS OUT - OUTPUT 8
DB-25 MALE (USER SUPPLIED)
Notes:
1. Status outputs are open collector Darlington transistors capable of sinking
100ma @ 30v DC.
2. Select and remote inputs are momentary closures with internal 4.7K pull up
resistors to 5v DC.
3. For Remote Control Operation a connection between Remote Enable pin
8 and Remote Enable Common pin 21 must be made.
.
17
GPMRC Remote Control Interface
The GPM-300 series audio switchers can be interfaced to the optional GPMRC Remote
Control interface panel. The GPMRC is a convenient remote control providing simple
pushbutton selection of audio routing. In addition the panel provides complete status of
channel selected for each output and audio presence status. The GPMRC uses 2 wire
shielded RS-485 communications so that up to 6 GPMRC remote panels can be
interconnected within a facility. This can provide a convenient audio router function for
master control operations with remote panels in studios or other locations. As supplied
from the factory the GPM-300 is configured to accept the interface of the GPMRC series
panels on the rear panel DB9 GPM-300 rear panel connector. Fig. is provided to show
proper configuration of the 10 position serial ribbon cable within the GPM-300. This
diagram is provided because some GPM-300 may be configured for RS-232
communications which is covered in the next section. Refer to the GPMC Remote
Control Interface Technical Reference Manual supplied with the optional GPMRC for
installation instructions.
The GPMRC Remote Control Panel provides simple push button control of the GPM
series audio switchers and status. Up to six GPMRC Remote Control Panels can be
connected to a single GPM-300 series switcher using 2 wire shielded cable intra-facility.
18
19
20
J1
J2
Analog Input or Com pos ite I/O
P3
P7
J8
J6
J4
J2
P5
JP9
ON
AS VIEWED FROM TOP W/ FRONT PANEL HINGED DOWN
FRONT PANEL REV C AND HIGHER
Us e P11 for
GPM RC Rem ote
Control Pane l
Se t JP9 for GPM RC
Re m ote Control Pane l
1 2 3 4
1700-4 REV E. DSP BOARD
J7
J2
J5
J1
J3
J5
Analog Output
J1
J2
AES AUDIO I/O BOARD
J4
P11
P5
P9
P1
J2
I A0 A1 A2
ON
IDC DB-25
GPIO 2
RC/EN/ STATUS
1
1
Ribbon
Connector
Legend
J2
I A0 A1 A2
ON
GPIO 1
SERIAL
IDC DB-9
Fig. 1 GPMRC Factory Configuration – For Reference
Sage Alerting/Digital Alert Systems Products Serial Interface
The GPM-300 can be serially controlled by Sage Endec and Digital Alert Systems
DASDEC EAS Encoder series. To connect and control a GPM-300 with these encoders:
Refer to Fig. 2 for internal serial cable configuration information. The GPM-300 rear
panel DB9 Serial connector is factory configured for RS-485 communications for use
with the optional BDI GPMRC Remote Control Panel which is an RS485
communications device. Sage Endec and Digital Alert Systems Dasdec encoders utilize
RS232 communications.To convert to RS232 serial protocol for the Sage and Digital
Alert Systems products follow the procedure outlined below:
GPM-300 RS485 to RS232 conversion:
The following procedure requires removal of the top cover of the unit. To remove the
cover remove 5 – 4-40 flat head screws across the rear cover, 2 – 4-40 flathead screws
on each side, and 3 – 6-32 flathead screws along the top front panel of the unit.
1. Referring to figure 2 locate and remove the 10 position header connector
plugged into P11 of the DSP board.This connector should be plugged into P9 on
the DSP board as shown in Fig. 2 be sure to line up pin one as shown.
2. Make certain that DSP board JP9 header jumper is installed as depicted in Fig 2
Once the above conversion has been made connect a straight-through DB9 cable from
COM6 of the Sage Endec encoder to the GPM-300 rear panel DB9 – “Serial” connector.
To make up your own cable connect review the diagram below for wiring details.
P1
From Sage Endec
COM 6
5
9
4
8
3
7
2
6
1
5
9
4
8
3
7
2
6
1
P2
To GPM-300 J2 RS-232 I/O
CONNECTOR DB9 MALE
CONNECTOR DB9 FEMALE
DB9 RS-232 Wiring Diagram
Fig. 2 Serial Serial Cable Modification for ENDEC/DASDEC Interface
21
J1
J2
Analog Input or Com pos ite I/O
P5
ON
AS VIEWED FROM TOP W/ FRONT PANEL HINGED DOWN
FRONT PANEL REV C AND HIGHER
JP9
P3
J8
P7
J7
J6
J2
Analog Output
J5
J1
1 2 3 4
1700-4 REV E. DSP BOARD
Set JP9 for Endec/Das de c
Inte rface
J3
J4
J2
J5
J1
J2
AES AUDIO I/O BOARD
J4
P11
22
P5
P9
GPIO 2
P1
Use P9 for Ende c/Dasde c Inte rface
J2
I A0 A1 A2
ON
IDC DB-25
RC/EN/ STATUS
1
1
Ribbon
Connector
Legend
J2
I A0 A1 A2
ON
GPIO 1
SERIAL
IDC DB-9
XI. Basic Block Diagram of GPM-300
DIGITAL or ANALOG AUDIO BOARD
A
PGM AUDIO INPUT 1
OUTPUT 1
DIGITAL OR ANALOG AUDIO BOARD
DIGITAL OUT 1
B
A
PGM AUDIO INPUT 2
OUTPUT 2
DIGITAL OUT 2
B
A
PGM AUDIO INPUT 3
OUTPUT 3
DIGITAL OUT 3
B
PGM AUDIO INPUT 4
AUDIO INPUTS
A
DSP
CHANNEL
MATRIX
OUTPUT 4
DIGITAL OUT 4
B
B
A
AUDIO OUTPUTS
OUTPUT 5
PGM AUDIO INPUT 5
DIGITAL OUT 5
B
A
OUTPUT 6
DIGITAL OUT 6
PGM AUDIO INPUT 6
B
A
OUTPUT 7
DIGITAL OUT 7
PGM AUDIO INPUT 7
PGM AUDIO INPUT 8
B
A
OUTPUT 8
DIGITAL OUT 8
B
BASIC GPM-300 BLOCK DIAGRAM
When the A/B inputs are programmed for each output the GPM-300 can be used as
shared source selector or for individual output A/B configurations as desired. For
example an input can be designated as a common source used by up 8 destinations
such as a network feed or EAS generator output for multiple studios. To accomplish this
set the B inputs for the desired outputs to be all the same such as CH 8. Then set the
individual A inputs for the normal feed for that output. Then on an output by output basis
each destination has quick access to the common feed. This type of setup is used quite
frequently for EAS or emergency feed types of operation where all destinations need to
be able to quickly share a source such as during an EAS alert or a network feed for an
important news story, etc.
If each destination requires access to all of the GPM-300 inputs then the GPMRC
remote control panel is recommended whereby any input is accessible to any output if a
23
GPMRC panel is located at the destination such as a control room/back up control
room. See page 18 GPMRC remote control interface instructions for more information.
XII. Frame Rate Conversion Switch Selection
The GPM-300 has active frame rate conversion on all AES3 digital inputs. The unit can accept sample
rates from 8 KHz to 96 KHz. The frame rate converter then up or down converts the sample rate to the
selected sample rate. The GPM-300 is capable of outputting 32, 44.1 or 48 KHz sample rates. The
factory default sample rate is 44.1 KHz. To change the sample rate to either 32 or 48 KHz refer to the
diagram below. The sample rate converters are located on the AES I/O board. Locate S1 and change
SR0, SR1 according to the chart below. Do not adjust any other DIP switch setting as this will result in
incorrect operation of the GPM-300. Correct DIP switch settings are provided for convenience.
SWITCHES "ON" = X
ANALOG AUDIO INPUT
X
ANALOG AUDIO OUTPUT
X
X
X
X
7
8
7
X
X
X
X
X
X
X
X
S/R
S/R
IsqC A2
X
TDM SEL
X
M/S
X
INTERRUPT
X
IsqC A1
X
IsqC A0
AES I/O - 2 for 8 CH Ver.
44.1KHz
DIP SWITCH SETTING FOR GPM-300 SERIES SWITCHERS
24
7 8
X
GPIO 1
GPIO 2 -GPM/DAB Versions
8
X
X
X
X
6
O/R
7
8
X X
S/R
X
X
5
S/R
AES I/O
4
S/R
X
3
S/R
DSP
2
S/R
1
S/R
BOARD
32KHz 48KHz
XIII. Specifications
Number of Inputs
4 or 8 by configuration
Number of Outputs
4 or 8 by configuration
Audio Formats
AES3, analog L/R, composite base
band – configuration dependent
Input Sample Rates:
8-96 KHz
Output Sample Rates:
32, 44.1 or 48 KHz – user configurable
Input Analog Specifications:
+ 4 dBm nominal, + 24 dBm maximum
input
Output Analog Specifications:
+ 4 dBm nominal, + 18 dBm maximum
output
Analog Frequency Response:
+/- 0.25 dB from 20 Hertz to 20 KHz
Analog THD:
less than 0.1% Total Harmonic
Distortion at headroom level
Base Band FM Stereo Input Level:
3.5 V Peak to Peak for 100% FM
Modulation
Base Band FM Stereo Output Level:
3.5 V Peak to Peak for 100% FM
Modulation
Base Band FM Stereo Frequency Response:
+/- 0.05 dBm 10 Hertz to 53 KHz
25
XIV. Warranty
Broadcast Devices, Inc. products are warranted against failure due to faulty materials
or workmanship for a period of one year from the date of shipment to the ultimate user.
The warranty covers repair or replacement of defective parts at the factory, provided the
unit has been returned prepaid by the user. All shipments to the factory shall have
affixed to the outside of the container a return authorization number obtained from the
factory. The above warranty is void if the unit has been modified by the user outside of
any recommendations from the factory or if the unit has been abused or operated
outside of its electrical or environmental specifications. If customer conducted field tests
suggest that the unit may be faulty, whether or not the unit is in warranty, a full report of
the difficulty should be sent to Broadcast Devices, Inc. factory. The office may suggest
further tests or authorize return for factory evaluation.
Units sent to the factory should be well packed and shipped to Broadcast Devices,
Inc. 2066 E. Main Street, Cortlandt Manor, NY 10567. Remember to affix the R.A.
number to the outside of the carton. Any packages received without such R.A. number
will be refused. Note: freight collect shipments will also be refused. When the unit has
been received, inspected and tested, the customer will receive a report of the findings
along with a quotation for recommended repairs, which are found falling outside of the
standard warranty. Units returned for in-warranty repairs, which are found not to be
defective will be subject to an evaluation and handling charge. In-warranty units will be
repaired at no charge and returned via prepaid freight.
Out-of-warranty units needing repair require a purchase order and will be invoiced for
parts, labor, and shipping charges.
When ordering replacement part, always specify A) Part Description, and Quantity; B)
Date of Purchase, Where Purchased; C) Any Special Shipping Instructions. Always
specify a street address, as shipping companies cannot deliver to a postal box.
Broadcast Devices, Inc. is not responsible for any other manufacturer’s warranty on
original equipment. Nor are we responsible for any failure, damage, or loss of property
that may occur due to the installation or operation of our equipment outside of
recommended specifications.
Broadcast Devices, Inc. reserves the right to change materials, specifications, and
features from time to time.
www.broadcast-devices.com
Broadcast Devices, Inc.
Email: Customer.Service@broadcast-devices.com
(914) 737-5032 Tel. (914) 736-6916 Fax.
26
FCC Compliance Statement:
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2) this
device must accept any interference received, including interference that may cause
undesired operation.
27
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