Park Air T6T, User Manual

Page: 16 / 73

Standby Indicator
A red indicator that lights when the transmitter is in standby mode. When in standby mode, most of the
transmitter's circuits are inactive, the front panel LCD is blanked, and the transmitter cannot be keyed.
Standby mode is selected and deselected using the front panel Scroll/Select switch and LCD, by
initiating an instruction through a MARC system, or through the VFP. Details of front panel selection and
deselection are given in the section of this user guide applicable to the particular operating mode.
Reference Connector
An SMB jack socket that allows a high impedance frequency counter to monitor the transmitter's
reference frequency. This connector is used only for maintenance purposes. The instructions for
checking and adjusting the reference frequency are given in the T6T maintenance handbook.
Microphone/Diagnostics Connector
A dual purpose connector that allows either a dynamic
microphone (and headset if sidetone is required) or a PC to be
connected to the transmitter. The connector is a 7-pin self
locking DIN socket.
A microphone/headset with integral PTT switch can be fitted to
this connector to enable the transmitter to be operated in local
mode. The connections are detailed in table 1-1. A PC can also
be connected to allow the VFP to be displayed. Using the VFP is
detailed in the T6T maintenance handbook. The connections at
the transmitter are shown in table 1-2.
Table 1-1. Microphone/Headset Connections
Headset/Diagnostics
Connector Pin Number
Signal Notes
1 Microphone ground 0 volt.
3 Microphone PTT 0 volt = PTT. 5 V pull-up = not PTT.
5 Sidetone to headset
200 ohm output impedance.
Maximum = 3 volt peak-to-peak.
6 Microphone input 6.8 kohm, 5 mV sensitivity.
Section 1 T6T Transmitter User Guide
Page 12
Fig. 1-2.
Microphone/Diagnostics
Connector Pin-Out
(DEV083-05)