manual afc3 three receiver rack mount chassis - K

manual afc3 three receiver rack mount chassis - K
MANUAL
AFC3
THREE RECEIVER
RACK MOUNT CHASSIS
NOTE: The HDST jack is a 1/4 inch stereo jack.
Do not use a MONO headset plug as damage may
result.
DAYTON INDUSTRIAL CORPORATION
2237 Industrial Blvd
Sarasota, Florida 34234
Telephone: (941) 351-4454 Fax: (941) 351-6081
Visit our website at www.daytonindustrial.com
AFC3 Manual
Jul 04
AFC3 Page 1
DAYTON INDUSTRIAL CORPORATION
MODEL AFC3 PROFESSIONAL THREE RECEIVER RACK MOUNT ODEL
DESIGNED ESPECIALLY FOR THE PROFESSIONAL MONITORING OR EAS MONITORING REQUIREMENTS,
THE AFC3 PROVIDES THREE RECEIVERS IN A CONVENIENT 1 3/4 INCH RACK MOUNT PACKAGE.
AVAILABLE RECEIVERS INCLUDE WEATHER, FM, AM, AND PUBLIC SERVICE BAND (148 TO 175 MHz).
THESE RECEIVERS ARE DESIGNED TO MEET PROFESSIONAL MONITORING AND EAS EQUIPMENT INPUT
REQUIREMENTS.
THE GENERAL SPECIFICATIONS ARE:
A standard 1 3/4 inch high 19 inch rack mount chassis designed
to contain up to three Dayton Industrial receivers. A minimum
of one receiver is required.
The AFC3 contains a front panel AUDIO SELECTOR switch,
mounted small speaker and HDST (headset) outputs controlled
by the VOL control.
Also mounted on the front panel are LED indicators that indicate
the presence of the CARRIER and MODULATION activity for
each receiver.
An ALERT LED indicator and TEST/RESET switch is mounted
on the front panel for those receivers that use tone detectors for
sensing the ALERT mode, such as the weather and public service
monitors.
The AFC3 rear panel contains the outputs for the chosen
receivers. These outputs are the audio LINE (RCA unbalanced
and DIN Balanced) outputs, SPKR (RCA) and RELAY (DIN)
outputs. The power input (12VDC) is also located on the rear
panel. Power is derived from a wall mounted converter.
Dayton Industrial Receivers:
We manufacture receivers that are designed to be components of
the AFC3. These include the AF220 FM receiver, the AF310
AM receiver, the AF610 Weather (NOAA) receiver, AF850
Series Public Service Monitors and AF200A FM/SCA Receiver.
DAYTON INDUSTRIAL CORPORATION
2237 Industrial Blvd., Sarasota, Florida 34234
Tel: (941) 351-4454 Fax: (941) 351-6081
E-Mail: daytonindustrial@aol.com
AFC3 Manual
Jul 04
In general, these receivers are phase lock loop (P.L.L.)
controlled with the frequency of operation selected
using internal DIP or BCD switches. A continuous
receiver LINE audio output is provided. A second
output (SPKR) is also provided. In the Weather and
Public Service monitors, the SPKR output audio is
controlled automatically by tone detector circuits that
monitor the receiver audio for the presence of specified
alert tones. There is also a TEST and RESET switch for
activating the SPKR audio and A LERT light manually.
All receivers have input power of 12 VDC and have
automotive type regulators.
POWER:
SIZE:
115VAC to 12Vdc
Power Converter (provided)
19” W x 9” D x 1 3/4” H
WEIGHT:
5.5 lbs. (w/o converter)
AFC3 CONTROLS/FEATURES :
? Three Receiver combined unit in a 1 3/4 inch rack,
? Front panel carrier and modulation LED indicators,
? Internal monitor speaker,
? Front panel HDST and VOL control,
? ALERT LED’s and TEST/RESET switch,
? 10 volt automotive type internal regulator allows
vehicle or battery standby operation,
? Designed for professional use.
Please visit our website:
www.daytonindustrial.com
AFC3 Page 2
1.0 DESCRIPTION
The AFC3 is configured at the factory with one, two or three receivers as ordered. The receivers
are described in the data attached to this manual. The receivers are labeled A,B,C for conve nience. The front panel also has an identifier label that describes the receiver, such as “Weather”,
FM 1, FM2, AM, etc.
2.0 POWER
Power is supplied to the AFC3 from a 12 Volt wall mounted power converter, capable of supplying 500mA minimum, (supplied with the AFC3).
The rear of the AFC3 has a 2.1 mm (center positive) power jack, labeled “12 VDC IN”, that
matches the plug on the converter supplied. Other 12 VDC sources can be used to supply power
to the AFC3. The internal regulators are 10 VDC automotive type allowing vehicle or standby
battery operation.
The front panel has a “PWR”, red LED that lights when power is applied. If power is supplied to
the AFC3, then power is applied to each internal receiver. The only way to disconnect the power
from an internal receiver mounted in the AFC3 is by removing the AFC3 cover and removing the
two pin power connector at the individual receiver board.
3.0 FRONT PANEL INDICATORS
3.1 CARRIER
There are three green LED indicators labeled, “CARRIER”. There is one indicator for each installed receiver. When power is applied, these indicators will light when a signal is received that
exceeds a set threshold (usually -90 dbm) at the frequency of operation set by the receiver PLL
circuit. Each receiver has switches that are set according to the manual to set the receiver operating frequency for that receiver. These switches are accessible only after removing the AFC3
chassis top cover. The CARRIER indicators are active at all times that power is applied to the
AFC3 chassis.
3.2 MODULATION
There are three amber LED indicators labeled “MODULATION”. When the carrier indicator is
lighted for a receiver, the associated MODULATION indicator will increase and decrease intensity with the modulation. These indicators are active whenever power is supplied to the AFC3
chassis and associated receiver.
If there is no carrier (carrier light “off”), the MODULATION indicator may be “on” continuously
with noise. If there is an un-modulated carrier, the carrier light will be “on” and the MODULATION indicator will be “off”.
For those receivers that have the tone detector circuits, the MODULATION indicator will be
“on”, indicating modulation, but the audio output may be “off”, depending on the state of the tone
detector circuits (“on” or “off”).
AFC3 Manual
Jul 04
AFC3 Page 3
3.3 AUDIO SELECT
The “AUDIO SELECT” switch mounted on the front panel is a four position switch which selects
the audio signal from the internal receivers and applies it to the front panel speaker or HDST jack.
The switch positions are labeled A,B,C, and OFF. Only one audio is selected at a time.
3.3.1 HDST
DO NOT USE MONO PLUG — USE STEREO PLUG ONLY
This is a 1/4 inc h standard jack for stereo headphones. All receivers are “MONO”, so the jack is
wired to have the mono signal at both headphones. The HDST jack is wired so that the internal
speaker is disconnected if the HDST jack is used.
3.3.2 VOLUME
The VOLUME control is mounted on the front panel. This controls the volume of the internal
speaker and HDST jack, if connected.
3.3.2 SPEAKER
The AFC3 has a small speaker (16 Ohm) mounted to the front panel. The audio selected by the
AUDIO SELECT switch is applied to the speaker. The speaker volume is controlled by the
VOLUME control.
3.4 TONE DETECT
There are three red LED indicators labeled “TONE DETECT” on the front panel. These indicators are used when the installed receiver(s) have “alarm” or “mute” tone detectors. For example,
the NOAA Weather Receiver cont ains tone detectors used to recognize “alert” tones which, when
present, un- mute the receiver. If the alert tone is recognized, the audio is applied to the receiver
output (rear panel), the AFC3 speaker, and the TONE DETECT light will light.
The tone detector circuits can be tested by selecting the receiver, A, B, or C using the AUDIO
SELECT switch and using the TEST/RESET switch located on the front panel. For example, if
the Weather receiver were installed as receiver B, select receiver B using the AUDIO SELECT
switch, and then using the momentary switch “TEST/RESET”, contact the TEST position and the
ALARM indicator will light and the Weather Receiver audio will be applied to the speaker or
headset. To reset the tone detector circuits, contact the RESET momentary switch position.
For receivers that do not have tone detector circuits, the TONE DETECT indicators do not operate.
3.4.1 TEST/RESET
This is a momentary contact switch used to test the tone detector circuits provided in the Weather
and Public Service monitor receivers. When selected by the AUDIO SELECT switch, the TEST/
RESET switch contacts will test and reset the receiver tone detector circuits. When the tone detector circuits are “on”, audio is applied to the speaker, the rear panel connector “SPKR” for the
receiver, and the “TONE DETECT” indicator is lighted.
AFC3 Manual
Jul 04
AFC3 Page 4
3.5 INDICATORS AND RECEIVERS
The operation of the indicators depends on the receivers installed in the AFC3.
RECEIVER
CARRIER
MODULATION
TONE DETECT
TEST/RESET
AF220 FM
Normal
Normal
None
None
AF310 AM
Normal
Normal
None
None
AF610 Weather
Normal
Normal
YES
YES/YES
AF810 Public Service Series
Normal
Normal
YES
YES/YES
AF200A FM/SCA
Select Main/SCA Select Main/SCA None
None
4.0 REAR PANEL CONNECTORS
4.1 POWER
The POWER input connector (a 2.1 mm (center positive) power connector) is located in the upper left hand corner of the rear panel and is labeled as 12 VDC IN. Power is supplied to the
AFC3 from a 12 Volt wall mounted power converter, capable of supplying 500 mA minimum,
(supplied with the AFC3).
Other 12 VDC sources can be used to supply power to the AFC3. The internal regulators are 10
VDC automotive type allowing vehicle or standby battery operation.
The front panel has a “PWR”, green LED that lights when power is applied. If power is supplied to the AFC3, then power is applied to each internal receiver. The only way to disconnect
the power from an internal receiver mounted in the AFC3 is by removing the AFC3 cover and
removing the two pin power connector at the individual receiver board.
4.2 RECEIVER CONNECTORS
The rear panel connectors depend on the type and number of receivers installed in the AFC3.
The connectors for each receiver do follow a pattern, however, as indicated below:
V
O
L
S
P
K
R
L
I
N
E
BAL
RELAY
A RF
IN
RF IN
“F” Connector
RF (Antenna) INPUT
RELAY
5 pin DIN
See para 4.2.2
BAL
5 pin DIN
See para 4.2.3
LINE
RCA
1 VRMS, 600 Ohm , Audio
SPKR
RCA
Receiver Audio Speaker Out (0.3 W, 16 Ohm)
VOL
ADJUST
SPKR Volume Control
AFC3 Manual
Jul 04
AFC3 Page 5
4.2.1 RF IN
This connector is an “F” connector for connecting to the antenna input. The connector is labeled A,B, or C to correspond with the front panel receiver labels, A, B, or C and identifiers,
FM1, FM2, AM, Weather, etc.
4.2.2 RELAY
For receivers that have carrier operated relays or alert tone relays a DIN connector is provided
on the rear panel.
This DIN connector is a five pin DIN connector. The pin connections are:
PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
Relay Armature Contact
Normally Clo sed Relay Contact
Normally Open Relay Contact
No Connection
No Connection
4.2.3 BAL
For receivers that have a balanced (600 Ohm) audio output, a DIN connector is provided on the
rear panel.
This DIN connector is a five pin DIN connector. The pin connections are:
PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
No Connection
No Connection
No Connection
L1 Balanced Line
L2 Balanced Line
4.2.4 LINE
This the receiver LINE output. The connector is unbalanced RCA for the audio or composite
receiver output. This output may be muted in some receivers by the tone detect circuits or the
carrier mute circuits.
4.2.5 SPKR
This is the receiver 8 Ohm speaker output. The speaker output volume is controlled by the rear
panel VOL adjustment. For some receivers the SPKR output is muted by the tone alert circuits
or carrier operated mute circuits.
AFC3 Manual
Jul 04
AFC3 Page 6
4.2.6 VOL
The VOL control is a clockwise screwdriver adjust control for the receiver SPKR audio output.
This control does not have any control of the LINE output or any of the front panel controls.
5.0 MAINTENANCE/REPAIR
The AFC3 chassis and installed receivers are all preset and tested at the factory. If any problems in operation are encountered, please contact the factory for assistance. Any receiver repair
requires a certain amount of test equipment to insure proper alignment and operation.
There are no maintenance requirements for the AFC3 or receivers other than periodic cleaning
as necessary. The AFC3 is designed for installation in an office or equipment room type environment.
6.0 ACCESS
In order to set the individual receiver operating frequency and make other operating settings for
each receiver, it is necessary to remove the AFC3 top cover by removing the 14 screws holding
the cover in place. Please refer to the attached manuals for each receiver type for instructions
for the receiver settings.
7.0 INTERNAL CABLING
Each receiver is attached to the front panel circuit boards that hold the switches and indicator
circuits by internal cables. These cable connectio ns are outlined in the diagrams below.
POWER 12 vdc
Interconnect between Boards 5 conductor
1
A
470 UF
1
1
1
B
C
1
1
- +
470 UF
Audio Line Inputs to
On-board Amplifier
3 conductor (one conductor to each
receiver)
Test/Reset and
Alert LED connector cables
5 conductor to receiver
CIRCUIT BOARD FBAFC3A: holds the AUDIO SELECT 4 position switch, TEST/RESET switch, ALERT
LED’s and associated circuitry.
CIRCUIT BOARD FBAFC3B: holds the CARRIER and MODULATION indicator LED’s and associated circuitry. This board has a 3 pin connector for connecting the “S” meter output from each receiver to the front panel
board for the CARRIER indicators. The audio for the MODULATION indicators is provided by the 5 conductor
interconnect cable that connects the two front panel boards.
AFC3 Manual
Jul 04
AFC3 Page 7
CARRIER/MODULATION INDICATOR BOARD:
5 conductor board Interconnect cable
RV1
RV2
RV3
“S” Meter input from each receiver
8.0 AFC3 ADJUSTMENTS
All adjustments are set at the factory for each individual receiver and also for the AFC3 circuit
boards. The potentiometers labeled RV1, RV2 and RV3 on the CARRIER/MODULATION
board (see above) set the level at which the receiver received field strength (“S” meter output)
will light the appropriate CARRIER front panel LED.
There are no othe r adjustments in the AFC3 circuitry.
9.0 RECEIVER MANUALS ATTACHED
Receiver manuals pertinent to the configuration of your AFC3 is attached.
AF200A FM/SCA
AF220 FM
AF310 AM
AF610 Weather Receiver
AF850 Series Public Service Band Monitors
AF852 Low Band (30 to 50MHz)
AF810 “High” Band (148 to 175 MHz)
10.0 TECHNICAL ASSISTANCE
For Questions or Assistance, contact:
Dayton Industrial Corporation
Attn: Engineering
2237 Industrial Blvd.
Sarasota, Florida 34234-3119 U.S.A.
Telephone: (941) 351-4454 (mornings are best)
Fax: (941) 351-6081
e-mail: engineering@daytonindustrial.com (we will attempt to respond on a timely basis)
web: www.daytonindustrial.com (technical information is available on website)
AFC3 Manual
Jul 04
AFC3 Page 8
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