Phone Level Control; Fault Lights; Remote Operating Procedures (Optional); Operation - Watkins-Johnson Company WJ-8718A/MFP Instruction Supplement

WJ-8718A/MFP INSTALLATION AND OPERATION
components of the signal are on the phones jack tip contact and the LSB components of the
signal are on the ring contact. In all other modes, only line audio is available and could be
monitored with either mono or stereo headphones.
2.4.4.9.1 PHONE LEVEL Control
The PHONE LEVEL control is a concentric potentiometer. The outer ring of the
control is rotated to vary the level of AUDIO 1 at the tip contact of the stereo PHONES jack.
The inner shaft is rotated to vary the level of AUDIO 2 at the ring contact. Clockwise rotation
increases audio level and counterclockwise rotation decreases audio level. In all detection
modes except ISB, both audios are line audio. In ISB mode, AUDIO 1 is USB and AUDIO 2 is
LSB. If mono headphones are in use, AUDIO 2 will not be monitored and rotation of the inner
ring of the PHONE LEVEL control will have no audible effect.
2.4.4.10 Fault Lights
The Microprocessor Front Panel contains DATA, ENTRY, and RCVR fault indica-
tors. If optional remote control is in use, the DATA fault indi~atorglows
red to inform the
operator that invalid data has been transferred in the remote data stream. The ENTRY fault
indicator illuminates if an invalid number or out-of-sequence entry has been made to the front
panel switches. An invalid numerical entry could be any number outside the range of the
terminating function. An out-of-sequence entry could be a terminator entry preceding a
numerical entry. In either case, the light ceases to glow when a valid entry is made. The
RCVR fault indicator glows red during normal operation if a power supply fault or LO unlocked
signal is detected.
2.4.5 REMOTE OPERATING PROCEDURES (OPTIONAL)
The remote operating procedures apply only to MFP Option equipped receivers,
which are also equipped with a remote I/O interface (232M or 488M).
2.4.5.1 232M Operation
A receiver equipped with the WJ-8718A/232M Option is ready to be interfaced with
a remote control device compatible with the RS-232/C EIA Standard Interface. The option
utilizes 8 signals: two for ground, two for data transfer, and four for handshake protocol. The
interface point between receiver and remote control equipment is the 25-pin, D-seri.es
connector at the REMOTE INPUT port on the receiver rear panel. A 25-pin connector at the
receiver rear panel MONITOR OUTPUT port is the interface point for connecting the next
receiver in the series chain. Up to 32 WJ-8718A HF Receivers, equipped with the
WJ-8718A/MFP and 232M Options and configured as slaves (see paragraph 2.4.2.3), can be
controlled by one remote control device, as shown in Figure 2-2.
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