AKG WMS 60, User Instructions, Page: 38 / 91

6. Plug the power cable on the supplied AC adapter into a con-
venient power outlet.
7. Switch the receiver ON with the POWER switch (1a).
Note:
For easy channel identification in a multichannel setup, you
can replace the snap fitted color code platelet (1j) with a dif-
ferent-color platelet included in the optional Color Coding Kit.
9.4.5. Antennas
For optimum reception, make sure to extend the two telescoping
antennas (1e) exactly as far as specified for each Frequency Set
in Table 1 on page 39.
9.5. System Adjustments
1.
Handheld transmitter
: Using the supplied screwdriver
(1q), set the GAIN control (2e) so that on the receiver the green
AF LED (1h) will light constantly and the red PEAK LED (1h) on
the receiver and the status LED (2b) on the transmitter will only
flash on the loudest signal peaks.
Bodypack transmitter
: Using the supplied screwdriver
(1q), set the GAIN control (3j) so that the green AF LED (1h) on
the receiver will light constantly and the status LED (3c) on the
transmitter as well as the red PEAK LED (1h) on the receiver will
only flash on the loudest signal peaks.
2. The red PEAK LED (1h) on the receiver and/or the status LED
(2b, 3c) on the transmitter lighting brightly means the transmit-
ter is overloaded. Turn the GAIN control (2e) or (3j) on the
transmitter CCW to the point that the PEAK (1h) and status (3c)
LEDs will only flash occasionally.
3. Set the VOLUME control (1b) on the receiver so that the receiv-
er output will optimally drive the connected device (e.g., mixer
input). Refer to the instruction manual for the connected device.
4. Check the perf o rmance area for "dead spots", i.e., places where
the field strength seems to drop and reception deteriorates.
If you find any dead spots, try to eliminate them by reposition-
ing the receiver. If this does not help, avoid the dead spots.
5. If unwanted noise becomes audible, turn the SQUELCH control
(1c) CW just enough to suppress the noise.
The MUTE LED (1f) will light every time the squelch mutes the
audio output of the receiver.
Important:
Never set the squelch threshold higher than abso-
lutely necessary. The higher the squelch threshold, the lower the
sensitivity of the receiver and thus the usable range between
transmitter and receiver.
6. Check the field strength of the received signal. If the RF LOW
LED (1g) lights, reposition the receiver and/or transmitter such
that field strength will increase back to optimum (OK LED (1g)
illuminating).
7. The MUTE LED (1f) on the receiver illuminating means no sig-
nal is received or the squelch is active.
Remedies: Switch the transmitter ON, move closer to the receiv-
er, or turn the SQUELCH control (1c) CCW to the point that the
MUTE LED (1f) will extinguish.
9.5.1. Multichannel Systems
If reception on the selected carrier frequency is disturbed, set the
carrier frequencies for all WMS 60 channels
up or
down one or two steps with the respective CHANNEL controls
(1d, 2g, 3f) on each transmitter and receiver.
This is necessary to provide the minimum frequency spacing re-
HT 60 PT 60 SR 60
Carrier frequency 138 to 142 MHz/169 to 220 MHz/240 to 250 MHz
Modulation FM
Audio bandwidth 50 to 20,000 Hz
Frequency stability (-10°C to +50°C) ±10 ppm
Rated deviation 30 kHz (US1a, US1b: 7.5 kHz)
T.H.D. at 1 kHz <0.8% <0.5%
Compander Yes
Signal/noise ratio typ. 50 dB(A) >100 dB(A)
Limiter Yes
RF output 10 mW
Current consumption typ. 120 mA 150 mA 200 mA
Power requirement 2x1.5 V AA size batteries 120/230 V AC, 50/60 Hz
Battery life >12 hours >10 hours
Input sensitivity typ. -95 dBm
Audio input level for rated deviation 350 mV/1 kHz 1400 mV/1 kHz
Input impedance 220 k
Ω
Condenser microphone power supply 6 V/6,8 k
Ω
on pin 3
Squelch threshold -75 to -70 dBm
Audio output balanced XLR: switchable be
tween microphone and line
levels; typ. 30 dB
unbalanced XLR: 6 dBm
unbalanced 1/4” jack: 0 dBm
Size (WxDxH) 240 x 36 dia. mm 92 x 65 x 20 mm 210 x 170 x 42 mm
(9.4 x 1.4 in.) (3.6 x 2.6 x 0.8 in.) (8.3 x 6.7 x 1.7 in.)
11. Specifications
This product conforms to ETS 300.422 and ETS 300.445 as well as Parts 15 (receiver), 74, and 90 (traveler) of the FCC Rules.