Instruction Manual
Model 2016-275
Downconverter
October 2011, Rev. B
F = 335.000
G = +25.0
MENU
EXECUTE
MODEL 2016
DOWNCONVERTER
C
ROSS
T
ECHNOLOGIES INC.
Data, drawings, and other material contained herein are proprietary to Cross Technologies, Inc., but may be reproduced or duplicated without the prior permission of Cross Technologies, Inc. for purposes of operating the equipment.
When ordering parts from Cross Technologies, Inc., be sure to include the equipment model number, equipment serial number, and a description of the part.
C ROSS T ECHNOLOGIES, INC.
6170 Shiloh Road
Alpharetta, Georgia 30005
(770) 886-8005
FAX (770) 886-7964
Toll Free 888-900-5588
WEB www.crosstechnologies.com
E-MAIL [email protected]
INSTRUCTION MANUAL
MODEL 2016-275 Downconverter
TABLE OF CONTENTS
Warranty
1.0 General
1.1 Equipment Description
1.2 Technical Characteristics
1.3 Monitor & Control Interface
1.4 Environmental Information
2.0 Installation
2.1 Mechanical
2.2 Rear Panel Inputs & Outputs
2.3 Front Panel Controls & Indicators 10
2.4 Operation
2.5 Menu Settings
PAGE
5
8
9
9
10
2
3
3
4
11
12
WARRANTY - The following warranty applies to all Cross Technologies, Inc. products.
All Cross Technologies, Inc. products are warranted against defective materials and workmanship for a period of one year after shipment to customer. Cross Technologies,
Inc.’s obligation under this warranty is limited to repairing or, at Cross Technologies, Inc.’s option, replacing parts, subassemblies, or entire assemblies. Cross Technologies, Inc. shall not be liable for any special, indirect, or consequential damages. This warranty does not cover parts or equipment which have been subject to misuse, negligence, or accident by the customer during use. All shipping costs for warranty repairs will be prepaid by the customer. There are not other warranties, express or implied, except as stated herein.
C ROSS T ECHNOLOGIES, INC.
6170 Shiloh Road
Alpharetta, Georgia 30005
(770) 886-8005
FAX (770) 886-7964
Toll Free 888-900-5588
WEB www.crosstechnologies.com
E-MAIL [email protected]
2016-275 Manual_Rev. B Page 2 10/24/2011
MODEL 2016-275 L-Band Downconverter
1.0 General
1.1 Equipment Description
The 2016-275 L-band Downconverter converts 250 - 750 MHz to 70 ± 18 MHz in 1 kHz, 10 kHz, 100 kHz, or
125 kHz steps (user selectable) with low group delay and flat frequency response. Synthesized local oscillators
(LO) provide very low phase noise and ±0.01 ppm stability frequency selection. Multi-function push button switches select the RF frequency, gain, and other parameters. Front panel LEDs provide indication of DC power (green), PLL alarm (red), and remote operation (yellow). Gain is adjustable manually over a 0 to +50 dB range as adjusted by the front panel multi-function push-button switches. Remote operation allows selection of frequency and gain. Parameter selection and frequency and gain settings appear on the LCD display.
Connectors are BNC female for IF output and the optional external reference input and output, and Type F female for the RF input. The 10 MHz option also includes a 10 MHz output connector, which contains either the internal or external 10 MHz reference signal. The unit is powered by a 100-240 ±10% VAC power supply, and housed in a 1 3/4” X 19” X 16” rack mount chassis.
AC
GND
F = 335.000
G = +25.0
MENU
EXECUTE
FRONT
MODEL 2016
DOWNCONVERTER
C
ROSS
T
ECHNOLOGIES INC.
RF IN LNB FUSE
F1
J2 DS8
VDC on RF
IF OUT 10 MHZ REF
OUTPUT
J1 J18
REAR
MONITOR
AND
CONTROL
9 8 7 6
1
J10
10 MHZ
EXT REF
INPUT
J3
FIGURE 1.1 Front and Rear Panels
J20
250 to
750
MHz
IN
F=335.000
G=+25.0
var atten
120 MHz
LP
70
MHz
OUT
EXT
10MHz*
INT
10MHz
CONTROLLER
Block Diagram
FIGURE 1.2 Block Diagram
*OPTIONAL
2016-275 Manual_Rev. B Page 3 10/24/2011
1.2 Technical Characteristics
TABLE 1.0 2016-275 Downconverter Specifications*
Input Characteristics
Impedance/Return Loss
Frequency
Noise Figure, max.
Input Level Range
Input 1dB compression
75 Ω /12 dB
250 to 750 MHz
15 dB (max. gain)
-70 to -20 dBm
-15 dBm
Output Characteristics
Impedance
Return Loss
Frequency
Output Level/Max linear
1dB compression
75 Ω (see TABLE 2.2 for connector options)
18 dB
70 ± 18 MHz
-20 dBm / -10 dBm
-5 dBm
Channel Characteristics
Gain range (adjustable)
Image Rejection
Frequency Response
Spurious Response
0.0 to +50.0 dB
> 50 dB, min.
±1.5 dB, 250 to 750 MHz ; ± 0.5 dB, 36 MHz BW
< -50 dBc, in band
Group Delay, max.
0.01 ns/MHz2 parabolic; 0.03 ns/MHz linear; 1 ns ripple
Frequency Sense Inverting or Non-inverting, selectable
Synthesizer Characteristics
Frequency Accuracy
Frequency Step
±0.01 ppm internal reference
1kHz, 10kHz, 100kHz, or 125 kHz (user selectable)
10 MHz level (In & Out) 3 dBm ± 3 dB (option E)
Phase Noise @ Freq
dBC/Hz
100 Hz
-75
1kHz
-85
10kHz
-90
100kHz
-110
1MHz
-120
Controls, Indicators
Freq/Gain Selection
Power; Alarm; Remote
Remote
Other
Direct readout LCD; manual or remote selection
Green LED; Red LED; Yellow LED
RS232C, 9600 baud (Options: RS485, Ethernet)
RF, IF Connectors
10MHz Connectors
Type F (female), BNC (female)
BNC (female), 50 Ω/75Ω (option E)
Alarm/Remote Connector DB9 (female) - NO or NC contact closure on Alarm
Size 19 inch, 1RU standard chassis 1.75” high X 16.0” deep
Power 100-240 ± 10% VAC, 47-63 Hz, 45 W max.
Options
-E
-L
-Q
-T
-W8
-W18
-W28
Connector Options
External 10 MHz Reference Input and Output
LNB voltage, +24VDC, 0.4 amps, Optional M&C: (RS-232 Std.)
RS-485 Remote Interface
Temperature Sensor
Ethernet; with Web Browser
Ethernet; with SNMP
Ethernet; TCP/IP addressable
See TABLE 2.2
*+10˚C to +40˚C; Specifications subject to change without notice
2016-275 Manual_Rev. B Page 4 10/24/2011
1.3 Monitor and Control Interface
A) Remote serial interface
Protocol - RS-485, RS-422 or RS-232C (selectable), 9600 baud rate, no parity, 8 data bits, 1 start bit, 1 stop bit.
7
8
5
6
9
3
4
1
2
M&C Cable Diagram - Cross Technologies Frequency Converters
Female DB-9
PC Com Port
Male DB-9
2015/16/17 M&C Port
RX
TX
DTR
SG
DSR
RTS
CTS
RX
TX
SG
7
8
5
6
9
3
4
1
2
Connector: Rear panel, DB-9 female
Pinouts (RS-485/422/232C)
7
8
9
4
5
6
Pin
1
2
3
Description
Rx-
Rx+ (RS-232C)
Tx+ (RS-232C)
Tx-
Ground
Alarm Relay - Common
Alarm Relay - Normally Open
Not Used
Alarm Relay - Normally Closed
2016-275 Manual_Rev. B Page 5 10/24/2011
B) Status Requests
Table 1.1 lists the status requests for the 2016-275 and briefly describes them.
*
PLEASE NOTE: The two character {aa}(00-31) prefix, in the table below,
should be used ONLY when RS-485, (OPTION-Q), is selected.
Command
Command Status
10MHz Ref Status
(option E ONLY)
Syntax*
{aaS1}
{aaS2}
Description
Returns {S1bbbbbbbccIA} where:
• bbbbbbb = Rx frequency (in kHz)
• cc = Rx gain
• I = 1 - spectrum invert enabled
• A = summary alarm; 1=alarmed, 0=normal
Returns {S2ER} where:
• E = 1 - external 10 MHz switched in
2016-275 Manual_Rev. B Page 6 10/24/2011
C) Commands
Table 1.2 lists the commands for the 2016-275 and briefly describes them. After a command is sent the 2016-
275 sends a return “>” indicating the command has been received and executed.
General Command Format - The general command format is {aaCND...}, where:
{ = start byte aa = Address (RS-485 only)
C = 1 character, either C (command) or S (status)
N = 1 character command of status request
D = 1 character or more of data (depends on command)
} = stop byte
* PLEASE NOTE: The two character {aa}(00-31) prefix, in the table below,
should be used ONLY when RS-485, (OPTION-Q), is selected.
Command
Set Receiver Frequency
Set Receiver Gain
Enable Spectrum Invert
Enable External 10MHz IN
(option E ONLY)
Enable Remote
Disable Remote
Syntax* Description
{aaC2xxxxxxx} where:
• xxxxxxx = 7 characters
• Range: 0250000 to 750000 kHz, in 1kHz steps min.
{aaC4xx} where:
• xx = 2 characters
• Range: 00 to 50 (0 dB to +50 dB, in 1 dB steps)
{aaC7x}
{aaCEx}
#
{aaCR0} where x =:
• 0 to disable spectrum invert
• 1 to enable spectrum invert where x =:
• 0 to disable External 10MHz ref signal
• 1 to enable External 10MHz ref signal
Just # sign
{CR and zero}
2016-275 Manual_Rev. B Page 7 10/24/2011
1.4 Environmental Information
A. Rack-Mounting - To mount this equipment in a rack, please refer to the installation instructions located in the user manual furnished by the manufacturer of your equipment rack.
B. Mechanical Loading - Mounting of equipment in a rack should be such that a hazardous condition does not exist due to uneven weight distribution.
C. Elevated Operating Ambient Temperature - If installed in a closed or multi-unit rack assembly, the operating ambient temperature of the rack may be greater than room ambient temperature.
Therefore, consideration should be given to Tmra.
D. Reduced Air Flow - Installation of the equipment in a rack should be such that the amount of air flow required for safe operation of the equipment is not compromised. Additional space between units may be required.
E. Circuit Overloading - Consideration should be given to the connection of the equipment to the supply circuit and the effect that overloading of circuits could have on over current protection and supply wiring.
Appropriate consideration of equipment name plate rating should be used when addressing this concern.
F. Reliable Earthing - Reliable earthing of rack-mounted equipment should be maintained.
Particular attention should be given to supply connections other than direct connection to the
Branch (use of power strips).
G. Top Cover - There are no serviceable parts inside the product so, the Top Cover should not be removed.
If the Top Cover is removed the ground strap and associated screw MUST BE REINSTALLED prior to Top Cover screw replacement. FAILURE TO DO this may cause INGRESS and/or EGRESS emission problems.
2016-275 Manual_Rev. B Page 8 10/24/2011
2.0 Installation
2.1 Mechanical
The 2016-275 consists of one RF/Controller PCB housed in a 1 RU (1 3/4 inch high) by 16 inch deep chassis. A switching, ±12, +24, +5 VDC power supply provides power for the assemblies. The 2016-275 can be secured to a rack using the 4 holes on the front panel. Figure 2.1 shows how the 2016-275 is assembled.
POWER
SUPPLY
FIGURE 2.1 Mechanical Assembly
2016-275 Manual_Rev. B Page 9 10/24/2011
2.2 Rear Panel Input/Output Signals
Figure 2.2 shows the input and output connectors on the rear panel.
AC - POWER IN
AC input for switching power supply.
100-240 ±10% VAC,
47-60 Hz.
AC
J2 - RF IN
250 to 750 MHz, -70 to -20 dBm input signal. Type F
(female) see Table 2.2.
F1 - LNB FUSE (option L)
0.5A, Fast Blo, 1/4” fuse; installing fuse places +24VDC, 0.4A max on the RF IN (J2 center pin).
J1 - IF OUT
70 ±18 MHz, -10 dBm max output signal. BNC
(female) see Table 2.2.
J10 - MONITOR AND CONTROL
DB9 (female) - see Table 2.1
GND
RF IN
LNB FUSE
F1
VDC on RF
IF OUT REF
OUTPUT
MONITOR
AND
CONTROL
5 4 3 2 1
9 8 7 6
EXT REF
INPUT
J2 DS8 J1 J18 J10 J3
DS8 - LNB ALARM LED (option L)
Lights yellow when +24VDC LNB voltage is present on RF IN (J2 center pin).
J18 - 10 MHz REF OUTPUT
+3 ± 3 dBm reference output.
50/75 Ω BNC (female).
FIGURE 2.2 2016-275 Rear Panel I/Os
J3 - EXT REF INPUT
3 ± 3 dBm external reference input.
50/75 Ω BNC (female)
6
7
4
5
Pin
1
2
3
8
9
Function
Rx-
Rx+ (RS-232C)
Tx+ (RS-232C)
Tx-
GND
Alarm Relay: Common
Alarm Relay: Normally Closed
Not Used
Alarm Relay: Normally Open
*Remote Serial Interface
Interface: DB-9 Female
Protocol: RS-232C, 9600 baud rate, no parity,
8 data bits, 1 start bit, 1 stop bit
Option
STD
B
C
D
M
N
NN
2.3 Front Panel Controls and Indicators
Figure 2.3 shows the front panel controls and indicators.
DS3 - ALARM LED
Red LED indicates downconverter alarm.
DS1 - REMOTE LED
Yellow LED indicates remote operation.
LCD DISPLAY
Display shows Downconverter frequency in MHz and Gain in dB
IF
BNC, 75Ω
BNC, 75Ω
BNC, 75Ω
BNC, 50Ω
BNC, 50Ω
BNC, 75Ω
Type N, 50Ω
S1 - MENU/EXECUTE BUTTON
Press this to get into Program mode and to execute any changes.
RF
Type F, 50Ω
BNC, 75Ω
BNC, 50Ω
BNC, 50Ω
Type N, 50Ω
Type N, 50Ω
Type N, 50Ω
F=335.000
G=+25.0
MENU
EXECUTE
DS6 - POWER LED
Green LED indicates presence of DC power.
S2 - VERT. TOGGLE
Vertical toggle switch that controls values in the
Menu items when in program mode. Does not function in the normal display mode
S3 - HORIZ. TOGGLE
Horizontal toggle switch that controls which values are being adjusted. Does not function in the normal display mode
FIGURE 2.3 2016-275 Front Panel Controls and Indicators
2016-275 Manual_Rev. B Page 10 10/24/2011
2.4 Operation
2.4.1 Installing and Operating the 2016-275 Downconverter
1. Connect a -70 dBm to -20 dBm signal to RF IN, J2 (Figure 2.2)
2. Connect the IF OUT, J1, to the external equipment
3. Connect 100-240 ±10% VAC, 47 - 63 Hz to AC on the back panel (Figure 2.2).
4. Set the input frequency (See Section 2.5 Menu Settings).
5. Set the gain for 0 to +50 dB (See Section 2.5 Menu Settings).
6. Be sure DS6 (green, DC Power) is on and DS3 (red, Alarm) is off (Figure 2.3).
7. Option L ONLY - To insert LNB +24 VDC on the RF center pin install 0.5A fast blo fuse (included) in
F1 and check that DS8 lights yellow (Figure 2.2)
8. AC Fuse - The fuse is a 5 mm X 20 mm, 2 amp slow blow (Type T) and is inserted in the far slot in the drawer below the AC input as shown in Figure 2.4. There is a spare fuse in the near slot. If a fuse continues to open, the power supply is most likely defective.
FUSE DRAWER
SPARE FUSE
AC Fuse - 2 amp slow blow (Type T),
5 mm X 20 mm
INPUT
~
100-240± 10%VAC
47-63 Hz
2A MAX
FUSE
TYPE T 2A GDC
250 VOLT
FOR 100 - 240 V~
FIGURE 2.4 Fuse Location and Spare Fuse
2016-275 Manual_Rev. B Page 11 10/24/2011
2.5 Menu Settings
2.5.1 Functions
This section describes operation of the front panel controls. There are three operator switches, the LCD display and alarm indicator LEDs. All functions for the equipment are controlled by these components. The functions are (see Figure 2.5):
Power Up
Normal Display
Menu 1 Frequency in MHz
Menu 2 Gain (0 to +50)
Menu 3 Set Unit to Remote Operation
Menu 4 Select Non-inverting or Inverting Spectrum
Menu 5 Select Frequency Step Size (1kHz, 10kHz, 100kHz, or 125kHz)
Menu 6 Select External 10 MHz Ref (option E)
Menu 7 Set Remote mode (option Q)
Menu 8 Set RS-485 address (option Q)
Save Menu When “R” is selected in any above menu or at the end of the menu options
Alarm indications appear on the LEDs (see figure 2.3).
All program changes must start with the operation of the Menu/Execute switch and must also end with the operation of the Menu/Execute switch verified by the “Save Settings?” Menu. If this sequence is not followed, none of the changes will take effect. If programming is initiated and no operator action takes place for approximately 30 seconds (before the final press of the Menu/Execute switch) the display will revert to its previous status and you will need to start over.
2016-275 Manual_Rev. B Page 12 10/24/2011
2.5.2 Power On Settings
NOTE: THE LAST STATUS OF A UNIT IS RETAINED EVEN WHEN POWER IS REMOVED.
WHEN POWER IS RESTORED, THE UNIT WILL RETURN TO ITS PREVIOUS SETTINGS.
When power is first applied, the LCD display goes through three steps.
1. The LCD goes black to show all segments are functioning.
2.The software version will be displayed.
REV 1.00
3. The present frequency and gain of the downconverter is shown.
F = 335.000
G = +25.0
The unit is now operational and ready for any changes the operator may desire.
2.5.3 Control Switches
1. Menu/Execute - Any change to the programming of the unit must be initiated by pressing the
Menu/Execute switch and completed by pressing the Menu/Execute switch.
2. Horizontal Switch - This switch is mounted so its movement is horizontal and moves the cursor left or right.
3. Vertical Switch - This switch is mounted so its movement is vertical and has two functions: a. During frequency, gain changes, the vertical movement will raise or lower the number in the direction of the arrows.
b. For other functions such Mute on/off, the vertical switch will alternately turn the function on or off regardless of the direction operated.
2016-275 Manual_Rev. B Page 13 10/24/2011
2.5.4 Frequency Changes
At any time during the modification process, if you have made a mistake and do not wish to save the changes you have made, do not press the Menu/Execute switch; simply do nothing for approximately 30 seconds, and the system will return to the normal operating mode or scroll to “R” and push the menu/Execute switch and select “NO” in the “SAVE SETTINGS?” window.
To change the FREQUENCY:
Operate the Menu/Execute switch until you get to the menu item you want to change see Figure 2.5 for the sequence of menu options. The following display is for changing the downconverter frequency:
F = 335.000
G = +25.0
Pressing the Up/Down switch down will toggle the display to:
F = 435.000
G = +25.0
By using the horizontal rocker switch the cursor can be moved left or right .
F = 435.000
G = +25.0
NOTE: CHANGES DO NOT TAKE PLACE ON FREQUENCY UNTIL YOU GO TO THE SAVE
MENU AND INDICATE YOU WANT TO SAVE THE CHANGES.
When the display indicates the value desired you can push the Menu/Execute switch to get to the next item:
G = +25 R
OR you can scroll to “R”, push the Menu/Execute switch to get to:
SAVE SETTINGS?
Y N
Selecting Y will save the new settings. Selecting N will revert to the previous settings.
Pushing the Menu/Execute switch then takes you to this:
F = 335.000
G = +25.0
Figure 2.5 gives the menu items and how to make changes.
2016-275 Manual_Rev. B Page 14 10/24/2011
2.5.5 Gain Changes
When you get to this menu note that the gain changes will be made as you make them but if you do not wish to save the changes you have made, scroll to “R” and push the Menu/Execute switch and select “NO” in the
“SAVE SETTINGS?” window or do not press the Menu/Execute switch; simply do nothing for approximately 30 seconds, and the system will return to the normal operating mode.
To change the GAIN:
Push the Menu/Execute switch to get to the gain setting (See Figure 2.5 for the sequence of menu options):
G = +25 R
Pressing the Up/Down switch will change the gain in 1 or 10 dB steps depending on the cursor location:
G = +35 R
By using the horizontal rocker switch the cursor can be moved left or right. Pressing the Up/Down switch will toggle the display digit selected until you have the desired gain.
G = +35 R
NOTE: THE GAIN WILL BE CHANGED AS YOU ADJUST THE NUMBERS. HOWEVER, THE
VALUE WILL NOT BE STORED UNTIL YOU INDICATE YES IN THE SAVE SETTINGS
WINDOW.
When the display indicates the value desired you can push the Menu/Execute switch to get to the next item:
REMOTE OFF R
OR you can scroll to “R” and push the Menu/Execute switch to get to:
SAVE SETTINGS?
Y N
Selecting Y will save the new settings. Selecting N will revert to the previous settings. Pushing the
Menu/Execute switch then takes you to this:
F = 335.000
G = +25.0
Figure 2.5 gives the menu items and how to make changes.
2016-275 Manual_Rev. B Page 15 10/24/2011
2.5.5 Alarm Indications
An alarm condition for will occur if any local oscillator phase lock loop (PLL) comes out of lock. The Mute
LED will light if you select Mute and the Remote LED will light when you select the Remote mode.
Power Up
ON POWER UP
REV 1.00
Normal Display
Menu 1 Frequency
Menu 2 Gain (0 to +50)
Menu 3 Select Non-Inverting or
Inverting Spectrum
Menu 4 Set Unit to Remote
Operation
Menu 5 Select Frequency Step Size
Menu 6 Select External 10 MHz
Reference (option E)
Menu 7 Set Remote Mode
(option Q)
Menu 8 Set RS-485 Address
(option Q)
NORMAL DISPLAY
F = 335.000
G = +25.0
PUSHING MENU/EXECUTE SEQUENCE
F = 435.000
R
G = +25
REMOTE OFF
DNSPECTRUM NON
STEP = 1 KHZ
EXT REF OFF
RS 485 OFF
ADDRESS = 00
R
R
R
R
R
R
R
SCROLL <>
SCROLL
SCROLL <>
SCROLL
SCROLL <>
SCROLL
SCROLL <>
SCROLL
SCROLL <>
SCROLL
SCROLL <>
SCROLL
SCROLL <>
SCROLL
SCROLL <>
SCROLL
Save? When “R” is selected or at
the end of the menu options
SAVE SETTINGS? Y N SCROLL <>
FIGURE 2.5 Menu Display and Sequence
PUSH BUTTON
PUSH BUTTON
PUSH BUTTON
PUSH BUTTON
PUSH BUTTON
PUSH BUTTON
PUSH BUTTON
PUSH BUTTON
PUSH BUTTON
PUSH BUTTON
2016-275 Manual_Rev. B Page 16 10/24/2011
C ROSS T ECHNOLOGIES, INC.
6170 Shiloh Road
Alpharetta, Georgia 30005
(770) 886-8005
FAX (770) 886-7964
Toll Free 888-900-5588
WEB www.crosstechnologies.com
E-MAIL [email protected]
Printed in USA
2016-275 Manual_Rev. B Page 17 10/24/2011
