Product Info

PTR for VHF-4000 and VDL-2000 Data Radios

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For any transmit or receive tests in VDL Mode 2, the unit must first be placed in VDL

Mode 2:

1) Ground the Voice/Data Discrete

2) Transmit 0008001D#, 8000235E# on CMU Port A input. This message must be sent at a

rate of at least once a second to maintain VDL Mode 2 operation.

3) Monitor CMU output bus for a label 270 message. Bits 20 – 24 show the mode status of the

radio, the status should be 0010.

4) Transmit 47000315# (ALO) on CMU Port A input.

5) Monitor CMU output bus for a label 270 message. Bits 20 – 24 show the mode status of the

radio, the status should be 0110.

6) Transmit D2050015# (Mode_Set.request) on CMU Port A input.

7) Monitor CMU output bus for a label 270 message. Bits 20 – 24 show the mode status of the

radio, the status should be 0111.

8) Transmit D201F115# (Pr_Set.request) on CMU Port A input.

9) Monitor CMU output bus for a label 270 message. Bit 11 should be set to 1 and Bit 14 11

should be set to 1 (Protocol Reset State).

10) Transmit one of the operating frequencies below on CMU Port A input.

11) Monitor CMU output bus for a label 270 message. Bit 11 should be set to 0 and Bit 14 11

should be set to 1 (Protocol Set State).

To set desired operating frequency in transmit and receive send the following

message on the CMU Port A input for the desired frequency:

a) 118.000 MHz command words:

AF040715# 020F115# 1207015# 84000015# 00100115# 99000015# B18CC815#

b) 118.425 MHz command words:

AF040715# 0020F115# 81207015# 04002A15# 00100115# 99000015# 3120A615#

c) 119.425 MHz command words:

AF040715# 0020F115# 01307015# 04002A15# 00100115# 99000015# B1BF7315#

d) 120.425 MHz command words:

AF040715# 0020F115# 81407015# 04002A15# 00100115# 99000015# 31786B15#

e) 121.425 MHz command words:

AF040715# 0020F115# 01507015# 04002A15# 00100115# 99000015# B1E7BE15#

f) 122.425 MHz command words:

AF040715# 0020F115# 01607015# 04002A15# 00100115# 99000015# B14FD015#