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SPECIFICATIONS
(Test conditions, unless otherwise specified: audio output measured be-
tween pin 2 and ground; PTT switch depressed; no hang-up button connec-
Ω
tion; dc VTVM 10 M
or greater input impedance; ac VTVM 1 M
greater input impedance.)
Type
Electret condenser
Frequency Response
200 to 4,000 Hz (see Figure 2)
+10
0
–10
20
50
100
200
TYPICAL FREQUENCY RESPONSE
Polar Pattern
Noise-cancelling bidirectional
Output Level (at 1,000 Hz, 1 cm)
–15 dB/100 µbar ± 5.0 dB (0.178 V)
(0 dB = 1 V/100 µbars)
DC Supply Current
2.8 mA ±0.3 mA
Hum Sensitivity
78 dB maximum equivalent SPL as measured in 12K Vac field
Audio Polarity
Positive sound pressure produces positive voltage at pin 2 with
respect to ground
Environmental Conditions
Operating Temperature:...–40
Storage Temperature: ......–16
Relative Humidity:...............0 to 100% (non-condensing)
Microphone Connector
6-conductor modular telephone type (6 conductors used)
Switch
Mechanical: Double-pole, single-throw, leaf-type, push-to-talk
function, normally open, cartridge shunt normally closed
Cable (optional)
Detachable, 1.4 m (48 in.), 5-conductor (1 shielded), vinyl-rub-
ber-jacketed coil cord with modular plug on microphone end
(see table for available installed equipment plugs)
Construction
Case: Black textured high-impact ARMO-DUR
Dimensions
See Figure 3
Net Weight
105 grams (3.7 oz), less cable
REPLACEMENT PARTS
Switch Assembly ............................................... RK263S
Cable and Modular Plug ......................See cordset table
FURNISHED ACCESSORIES
Screwdriver......................................................... 80B498
Mounting Bracket................................................ RK6MB
500 1,000 2,000
5,00010,000 20,000
FIGURE 2
°
°
°
to 76
C (-40
to 185
°
°
°
to 76
C (-65
to 185
44.4 mm
(1-3/4 IN.)
40.4 mm
Ω
or
(1-19/32 IN.)
MICROPHONE CABLES
The 592T can be used with various MODULINK
cables. Each cable has a modular microphone plug on one end
and the user's choice of equipment plugs on the other. The MOD-
ULINK Cordset Table supplied with the 592T lists the most popular
radios with biased audio available, and the cordset (ALM-) for use
with each. Note that the ALM-1 has no connector on the equipment
end; it can be wired as needed.
The cable is attached to the 592T by inserting the modular tele-
phone-type plug in the microphone jack until it locks. To remove the
cable from the microphone, insert the small screwdriver supplied
with the 592T in the rear case hole just above the cable jack to un-
lock the plug and withdraw the plug from the jack.
TABLE 1--MICROPHONE CONNECTOR WIRING
Pin
Color
°
F)
°
1
NC
F)
2
Red
3
Yellow
4
Blue
2
70 mm
(2-3/4 IN.)
64 mm
(2-1/2 IN.)
OVERALL DIMENSIONS
FIGURE 3
Function
Pin
—
5
Bias (+), DC
6
Audio Out
PTT Switch
7
Monitor
8
MICROPHONE END CABLE WIRING
FIGURE 4
101 mm
(3-31/32 IN.)
microphone
Color
Function
Black
PTT Switch
Ground
White
Audio
Drain
Ground
NC
—
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