Ground Connector; If In (J4, Buc-4000 Only); Comm (J6, Buc-/Bdc-4000); Table 3-7. Unit 2 Comm (J6) Connector Pinouts - Comtech EF Data MBT-4000 Installation And Operation Manual

MBT-4000 Multi-Band Transceiver System
External Connectors
3.2.1.7

Ground Connector

A #10-32 stud is used for connecting a common chassis ground among equipment.
3.2.1.8

IF IN (J4, BUC-4000 ONLY)

3.2.1.9

COMM (J6, BUC-/BDC-4000)

The J4 IF IN connector, located on the BUC-4000 Block Up Converter Module, is
a Type 'N' female connector, used to provide the IF Input signal for the
upconverter.
The J6 COMM connector, featured on both the BUC-4000 Block Up
Converter and BDC-4000 Block Down Converter Modules, is used for
connecting the module to the MBT-4000 Base Module J3 UNIT 1 COMM
or J6 UNIT 2 COMM connectors via the 15-15 Power & Signal Harness
(CEFD P/N CA/WR10963-1), as shown in Figure 3-2 and Figure 3-3.

Table 3-7. UNIT 2 COMM (J6) Connector Pinouts

Pin Signal
A SUM FLT
B TxD BXC
C Tx+ BXC
D GND
E +7.5V
F +7.5V
G +15V
H GND
J Rx+ BXC
K Rx- BXC
L Tx- BXC
M RxD BXC
N SPARE
P 10 MHz REF
R SPARE
NOTE – Mating Connector:
CEFD P/N CN/8LT5-15B15SN
3–7
Revision 4
MN/MBT4000.IOM