User's Manual

M7X and M7R Page 4-22 Installation

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Audio – Wideband (A) Connector

An 8-way RJ48 socket marked WB(A) that is used to connect wideband audio and signalling.

WB (A) is used for the primary wideband audio connection point for data systems.

The pin-out is listed in Table 4-9.

The connector has an integral amber indicator that lights when the PTT input is active.

Note:

All line levels for this connector are equivalent to sine wave level regardless of the waveform

selected. The peak to average ratio of a sine wave is 3 dB.

A sine wave signal applied at the same level as the line in setting, with the ALC off, will result in the

transmitter achieving its specified modulation level. Similarly, receiving a signal at the same modulation

level as the transmitter specified level, with the audio AGC off, will result in a sine wave signal being the

same level as the line out setting.

Table 4-9 Wideband (A) Audio Connector Pin-Out

Pin Signal Characteristics Input or Output

WB (A) line out -

WB (A) line out +

Balanced 600 ohm output adjustable between -10 dBm

and +10 dBm in 1 dB steps. The factory default setting is

0dBm.

Output

3 PTT indication

Grounding, normally open, solid-state relay that

indicates an active PTT. The relay operates between

-60 V and +60 V ac or dc, at a maximum 100 mA.

Output

WB (A) line in +

WB (A) line in -

Balanced 600 ohm input adjustable between -10 dBm

and +10 dBm in 1 dB steps. The factory default setting is

0dBm.

Input

6 WB (A) squelch

Grounding, normally open, solid-state relay providing a

squelch indication output. The relay operates between

-60 and +60 V ac or dc at a maximum current of 100 mA.

Output

7 Ground 0 V. -

8 WB (A) PTT TTL input. An active low keys the transmitter circuit. Input