Product Info

PTR for VHF-4000 and VDL-2000 Data Radios
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©2000 Rockwell Collins, Inc Page 56 of 61
429CMU_HS_IN_B_B 2
422_DATA_IN_A 20
422_DATA_IN_B
422_DATA_IN Differential RS422 Input
21
422_DATA_OUT_A 24
422_DATA_OUT_B
422_DATA_OUT Differential RS422 Output
23
RX_AUDIO_OUT RX_AUDIO Analog output (100 mW) 33
SIDETONE_AUDIO_OUT SIDETONE_AUDIO Analog output (100 mW) 31
AUDIO_OUT_RETURN Return 19
SPARE_DISCRETE_IN Discrete input 13
PTT_SEL PTT_DISC Gnd = Keyed
Open = Not Keyed
Discrete input 35
SCOM_CNTL_1_SEL SIMULCOM_1 See Simulcomm
Strapping
Discrete input 16
SCOM_CNTL_2_SEL SIMULCOM_2 See Simulcomm
Strapping
Discrete input 34
VOICE_DATA_SEL V/D_DISC Gnd = Data
Open = Voice
Discrete input 17
TX_MODE_IND TX_MODE Gnd = Transmit
Open = Receive
Discrete input 3
MIC_AUDIO_IN MIC_AUDIO Analog input 4
WOW_SEL WOW Gnd = Ground
Open = Air
Discrete input 14
UNIT_SDI_A_SEL UID_A See Unit ID setting Strap input 15
UNIT_SDI_B_SEL UID_B See Unit ID setting Strap input 18
SYSTEM_ON_F SYSTEM_ON_F OPEN=OFF
0-7 VDC ON
Discrete input 27
DATALOAD_ENB_SEL DATALOAD Gnd = Enabled
Open = Disabled
Discrete input 29
(+28VDC_PRI_PWR_H_1) 28VDC Power 10
(+28VDC_PRI_PWR_H_2) 28VDC Power 11
(+28VDC_PRI_PWR_L_1) 28VDC Power Return 8
(+28VDC_PRI_PWR_L_2) 28VDC Power Return 9
CHASSIS_GROUND Chassis Ground 12
MIC_AUDIO_GND Return 30
NC_1 No Connect 26
NC_2 No Connect 25
Unit Simulcomm Strapping
Simulcom_Cntl_1_Sel Simulcom_Cntl_2_Sel Threshold Level (dBm)
0 (ground) 0 (ground) Attenuator Disabled (> 0 dBm)
0 (ground) 1 (open) Programmable Value 1 (-10 dBm)
1 (open) 0 (ground) Programmable Value 2 (-30 dBm)
1 (open) 1 (open) Programmable Value 3 (-20 dBm)
(preferred condition)
Programmable values should be able to implement attenuation thresholds over the range of 0 - -30 dBm.
SDI setting is defined as follows: