Standard C828M - Page 5

Channels.
(4) Twisted Wire
Twisted wire is used for stable impedance conversion and wide bandwidth
characteristics.
(5) Splatter Filter
The RC network filter and the transistor operated splatter filter provide
high clarity and high average level of modulation, and cause no interference
with other Channels through expansion of the band occupancy.
(6) Microphone Gain Control
A semi-fixed resistor for microphone gain control is mounted on the main
printed wiring boad for transmitter.
(7) Transmitter Indicator Lamp and Meter
When the push button on the microphone is pressed, the red pilot lamp
illuminates to show that the transmitter is in transmitting mode. Düring the
transmission, the meter indicates the relative value of the transmitting Output.
(8) Channel Selector With Short-circuiting Ring
The Channel selector of C828M is provided with a short-circuiting ring to
prevent possible interference caused when additional Channels are installed
or when the frequencies of neighboring Channels are adjusted, thereby help-
ing make the frequency alignment much easier during the installation of ad
ditional Channels. The trimmer capacitor for delicate alignment for both the
transmitter and receiver performs accurate adjustment of all the Channel fre
quencies.
(9) Uncasing Possible with No Holp of Tools
Uncasing is possible with the two screws in the rear removed by the fi n-
gertip Operation. This feature lends itself to the addition of the Channel and
other purposes.
(10) Anodized Alminum Chassis
Anodized alminum is used for both the case and chassis. The main chassis
is 2mm thick for an adequate mechanical strengt and designed to show good
heat sink effect.
(11) Antenna Connector
The M-shaped antenna connector screws have their pitches available com-
monly in both inch and millimeter.
(12) Microphone Connector with Speaker Terminal
A 4-pin connector is used for microphone connection. Since audio Output
is connected to No. 4 pin, this connector permits connection of telephone
handset as well as the microphone.
(13) Accessory Terminal (A.T.)
A 9-pin accessory terminal is provided on the rear for connections of ac
cessory units from outside.
(14) Wide Range of Operating Temperature
The operating temperature ranges from —30°C to -)-60°C. This is good
enough for mobile Operation even in severely cold environments.
(15) Microphone with Switches
The microphone is equipped with external oscillator switch and P.T.T.
Switch (microswitch). Sharp switching from transmission mode to reception
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