Product Info

PTR for VHF-4000 and VDL-2000 Data Radios
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©2000 Rockwell Collins, Inc Page 27 of 61
Production Limit:
<= 3 dB
1.2.7.1.1. AGC TRACKING @ -60 DBM
1) Set the RF generator output level to -60 dBm.
2) Verify the change in audio output level from Ref
AGC
in dB.
Production Limit:
<= 3 dB
1.2.7.1.1. AGC TRACKING @ -70 DBM
1) Set the RF generator output level to -70 dBm.
2) Verify the change in audio output level from Ref
AGC
in dB.
Production Limit:
<= 3 dB
1.2.7.1.1. AGC TRACKING @ -80 DBM
1) Set the RF generator output level to -80 dBm.
2) Verify the change in audio output level from Ref
AGC
in dB.
Production Limit:
<= 3 dB
1.2.7.1.1. AGC TRACKING @ -90 DBM
1) Set the RF generator output level to -90 dBm.
2) Verify the change in audio output level from Ref
AGC
in dB.
Production Limit:
<= 3 dB
1.2.7.1.1. AGC TRACKING @ -104 DBM
1) Set the RF generator output level to -104 dBm.
2) Verify the change in audio output level from Ref
AGC
in dB.
Production Limit:
<= 4 dB
7.2.1.8 VOICE AUDIO OUTPUT
1.2.8.1.1. COMBINED AUDIO OUTPUT LEVEL
1) For the VHF-4000 only.
2) Set the UUT discrete inputs to “standard discrete configuration”.
3) Set the RF Generator to -54 dBm output level at 126.600 MHz, modulated 80% by a 1 kHz sine wave.
4) Set the ARINC control data to “Standard 25 kHz ARINC Configuration” on channel 126.600.
5) Verify the analog audio output level at the combined audio output (VHF4000 pins 25 and 26).
Production Limit:
7.75 +/- 0.2 Vrms
1.2.8.1.1. RECEIVED AUDIO OUTPUT LEVEL
1) Set the UUT discrete inputs to “standard discrete configuration”.
2) Set the RF Generator to -54 dBm output level at 126.600 MHz, modulated 80% by a 1 kHz sine wave.
3) Set the ARINC control data to “Standard 25 kHz ARINC Configuration” on channel 126.600.
4) Verify the analog audio output level at the received audio output (VHF-4000 pins 19 and 26, VDL-
2000 pins 33 and 19).
Production Limit:
7.75 +/- 0.2 Vrms
1.2.8.1.1. AUDIO OUTPUT PHASING