Changing The Frequency - Lectrosonics UM400a Quick Start Manual

Frequency Select Switches
Two 16-position rotary switches adjust the
center frequency of the carrier. The 1.6M
is a coarse adjustment and the 100K is the
fine adjustment.

Changing the Frequency

Locate the two small rotary switches. (On the UM400a/UM450, slide open
the small door on the side of the transmitter.) With the small screwdriver
0 1
F
E 2 E
D 3 D
C C
4
B 5 B
6
A A
9 7
8
5
Transmitter Frequency
Select Switches
If you are using a receiver with a frequency scan function, find a clear fre-
quency with the receiver, then set the transmitter to match. With Lectrosonics
400 Series receivers, a front panel LCD character display will indicate the
correct transmitter switch settings as a two-character alphanumeric hex code
once a clear frequency has been located with the scan function.
6
Switch Setting code is 56, thus the lefthand switch
0 1
F
on your transmitter should be set to "5" and the
2
3
righthand switch to "6".
4
5
6
9 7
8
Note: Be sure to orient the transmitter so the
6
nomenclature reads correctly (not upside down).
0 1
F
E 2
D 3
C
B 5
A 6
9 7
8
1.6M
supplied with the kit, turn the left
switch to the first character in the
two-digit Transmitter Frequency
Switch Setting code, then turn the
right switch to the second character
of the two-digit code. For example:
the frequency display is 623.000,
0 1 0 1
F F and two-digit Transmitter Frequency F F
E E 2 2 E E
3 3
D D D D
C C C C
4 4
B B 5 5 B B
6 6
A A A A
9 9 7 7 9 9
8 8
LECTROSONICS, INC.
0 1
F
E
D
C
4
B
A
9 7
8
100K
0 1 0 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
2
3
4
5
6