Product Info
PTR for VHF-4000 and VDL-2000 Data Radios
______________________________________________________________________
______
©2000 Rockwell Collins, Inc Page 12 of 61
6.
Alignment
Connect main connector plug from test station to UUT.
Apply 27.5 ± 0.5 Vdc to the power input.
VHF-4000, power pins 58, 64 and ground pins 59, 65.
VDL-2000, power pins 10, 11 and ground pins 8, 9.
Wait 30 seconds for the unit to complete power on testing.
The VHF4000 or VDL2000 may be aligned per Section 6.3 Alignment Procedures or with the automatic
alignment system (CATS-21) executing DGS-005.
6.1 SOFTWARE LOAD PROCEDURE
Load the desired top-level software using the data loader capability of the VHF-4000 or the boundary scan
interface.
6.2 CALIBRATION AND TFM PARAMETERS
The VHF-4000 uses electronic alignment for circuits that use values for various parameters stored in
FLASH memory. TFM parameters are those that require different values depending upon temperature,
frequency or mode. Calibration parameters are those that are the same for all temperature, frequency, and
mode.
6.2.1 Initialization of Calibration Parameters
Store into FLASH memory the hex values for calibration parameters listed in the following table or the
nominal value (nominal values derived from trend data).
Calibration Parameter # Applicable
Mode
Value
(hex)
Notes
Combined Audio Level Adjust 43 Rx 4268 level adjust for combined audio Rx output
Digital Audio Level Adjust 44 Rx 23E7 level adjust for digital audio Rx output
Rx Compressor Threshold 45 Rx 250F input level threshold for receiver compressor
Carrier Squelch Mute Threshold 46 Rx 7FFF Carrier Squelch muting upper limit
Carrier Squelch Unmute Threshold 47 Rx 7FFF Carrier Squelch unmuting upper limit
25 kHz Noise Squelch Mute Threshold 48 Rx 7FFF 25 kHz Noise Squelch muting upper limit
25 kHz Noise Squelch Unmute
Threshold
49 Rx 0000 25 kHz Noise Squelch unmuting lower limit
8.33 kHz Noise Squelch Mute
Threshold
50 Rx 7FFF 8.33 kHz Noise Squelch muting upper limit
8.33 kHz Noise Squelch Unmute
Threshold
51 Rx 0000 8.33 kHz Noise Squelch unmuting lower limit
138.6 MHz Noise Squelch Mute
Threshold
52 Rx FFFF 138.6 MHz Noise Squelch muting upper limit
138.6 MHz Noise Squelch Unmute
Threshold
53 Rx 0000 138.6 MHz Noise Squelch unmuting low limit
Digital Audio Sidetone Level Adjust 54 Tx 2C76 level adjust for digital audio sidetone output
Combined Audio Sidetone Level Adjust 55 Tx 1C39 level adjust for combined audio sidetone out
Low Voltage Scaling Threshold 56 Tx 07D0 low volt limit for signal scaling in transmits
VSWR Scaling Threshold 57 Tx 4E20 VSWR limit for signal scaling in transmits
Analog Tx Compressor Threshold 58 Tx 6DE level to begin analog Tx signal compression
Digital Audio Tx Compressor Threshold 59 Tx 07FF level to begin digital Tx signal compression
Tx Power Upper Threshold for all but
Mode 2
60 Tx 07FF V Fwd high limit for non-Mode 2 Tx faults
Tx Power Lower Threshold for all but
Mode 2
61 Tx 0000 V Fwd low limit for non-Mode 2 Tx faults
Tx Power Upper Threshold for Mode 2 62 Tx 07FF V Fwd high limit for Mode 2 Tx faults
Tx Power Lower Threshold for Mode 2 63 Tx 0000 V Fwd low limit for Mode 2 Tx faults
VSWR Fault Threshold 64 Tx 7FFF VSWR limit for reporting of faults
PA Over Temperature Threshold 65 Tx 0783 PA temperature limit at which Tx is aborted
+3.3 VDC Upper Threshold 66 Rx/Tx 09C5 fault upper limit for +3.3 VDC input value