Midland XT511 Alignment Procedure

XT511
ALIGNMENT PROCEDURE
5. TRANSMITTER OUTPUT POWER CONFIRMATION
A. Set unit to channel 1.
B. Press & hold the PTT button.
C. Transmit power should normally be between 3.0W to 4.0W. (Conducted)
D. Set unit to channel 14.
E. Press & hold the PTT button. Ensure that Tx Power meets 0.2W - 0.8W. (conducted)
6. TRANSMITTER DEVIATION ALIGNMENT
A. Connect an audio generator (600 ohms) to the ear jack. The audio frequency should be set
at 1KHz with a level of 200mV RMS.
B. Connect an FM deviation meter (communications test set) to Antenna contact. Set the
monitor to read peak to peak divided by two [(pk-pk)/2] deviation. Set filter of equipment
from 25Hz to 15KHz.
C. Press & hold the PTT button.
D. Align RV201 for +/- 2.1 kHz deviation (+/-0.1KHz). RV201 is located on the left of X102.
E. Decrease audio generator level until deviation reads +/- 1.5 kHz (approximately 12mV) and
record generator level. Level should be between 6 mV and 10 mV.
F. Confirm that transmit audio distortion is less than 5%.
7. RECEIVER ALIGNMENT
A. Set the output level of the RF signal generator for -47dBm. The generator should be set for
1.5 kHz deviation at 1 kHz audio.
B. Set volume level 4 (It is initial.).
C. Connect Audio analyzer to TP10.
D. Set equipment filter 25Hz to 15KHz.
E. Align L407 to get a maximum output level & a minimum distortion and confirm that Rx
audio distortion is less than 5%.
F. Confirm that Rx Sensitivity is less than -118dBm (nominally -120dBm) by reducing the
output level of the RF signal generator until a 12 dB SINAD reading is achieved.
H. Set SSG output level until 9dB sinad sensitivity and align RV1 until the unit is un-squelched.
I. While Press & hold the Call, Scan and Menu buttons, the knob clockwise to switch on the
radio.
J. Set SSG output level until 12dB sinad sensitivity. And then push the menu button.
K. Set signal generator level to -47dBm.
L. With 1.5KHz deviation at 1KHz modulation, set volume for maximum audio. Audio level
should be on over than 1.7Vrms.
8. LOW BATTERY INDICATOR CONFIRMATION
A. Set unit to receiving mode. Don’t set transmitter mode..
B. Set power supply voltage to 6.0Vdc.
C. Decrease power supply voltage until low battery icon blinks.
9. POWER OFF CURRENT CONSUMPTION
A. Set power supply voltage to 6V and connect to unit.
B. Confirm current. It must be less than 100uA.

Midland XT511 Specifications

General

Operating frequency	462.550 - 467.7125 MHz
Battery type	AA
Rechargeable	Yes
Number of batteries supported	4

Weight and Dimensions

Weight	544.3 g
Dimensions (WxDxH)	190.5 x 69.95 x 165.1 mm