2
SPECIFICATIONS
(Test conditions, unless otherwise specified: audio output measured be-
tween pin 2 and ground; PTT switch depressed; no hang-up button connec-
tion; dc VTVM 10 M
Ω
or greater input impedance; ac VTVM 1 M
Ω
or
greater input impedance.)
Type
Electret condenser
Frequency Response
200 to 4,000 Hz (see Figure 2)
TYPICAL FREQUENCY RESPONSE
FIGURE 2
Polar Pattern
Noise-cancelling bidirectional
Output Level
(at 1,000 Hz, 1 cm)
–15 dB/100
µ
bar
±
5.0 dB (0.178 V)
(0 dB = 1 V/100
µ
bars)
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
°
to 76
°
C (-40
°
to 185
°
F)
Storage Temperature: ......–16
°
to 76
°
C (-65
°
to 185
°
F)
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
OVERALL DIMENSIONS
FIGURE 3
MICROPHONE CABLES
The 592T can be used with various MODULINK
microphone
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.
MICROPHONE END CABLE WIRING
FIGURE 4
500 1,000 2,000
5,00010,000 20,000
50
100
200
20
0
+10
–10
TABLE 1--MICROPHONE CONNECTOR WIRING
Pin
Color
Function
Pin
Color
Function
1
NC
—
5
Black
PTT Switch
Ground
2
Red
Bias (+), DC
Audio Out
6
White
Audio
3
Yellow
PTT Switch
7
Drain
Ground
4
Blue
Monitor
8
NC
—
101 mm
44.4 mm
40.4 mm
70 mm
64 mm
(3-31/32 IN.)
(2-1/2 IN.)
(2-3/4 IN.)
(1-19/32 IN.)
(1-3/4 IN.)
