The Rx Meter and Tx Meter functions in the MASTR IIe
are used with the Meter Switching kit, 19B226293G1. See
LBI-4848.
In the MASTR III, PWR returns a voltage proportional to
the reflected power in the circulator. Rx is the RSSI line from
the IF module. Tx and EXT are external metering points on
the MASTR III and are brought to a header on the MIII
backplane for use in special functions. Otherwise, they are
available for the operator to use in various metering applica-
tions.
The display will provide the appropriate abbreviations
and current level. These readings are updated every 2 sec-
onds (see Figure 7).
The Handset can also present these data in decimal format.
By pressing the "B" key while in the metering mode, the
handset will toggle from volts to decimal. The decimal meas-
urement range is 0 to 255.
Decimal data are presented with no spaces between the
numbers. The default is analog voltages.
CHANNEL SELECT MODE
In multi-frequency MASTR IIe stations, the Utility Hand-
set can change the selected channel.
To enter the Channel Select Mode from the main menu,
press the "C" key (see Figure 8).
The display will show the current channel. To change
channels press the channel number desired (1-4). Assuming a
two channel station with channel 1 as the current channel,
pressing the 2 key will result in the handset displaying "C SEL
2". In order to complete this channel selection, the C key must
be pressed. Now the handset will display "CHAN 2".
If desired, adjustments to the Channel Guard Level settings
for channel 2 may now be made. It should be noted that when
the handset is in the Channel Select Mode ("C SEL x"), any
entry may be discarded by pressing the CLR key. Pressing the
CLR key a second time will return the handset to the "MENU"
display.
The Channel Select Mode may also be entered from the
Channel Display Mode ("CHAN x") by using the "C" key.
The resulting display is "C SEL". Channel selection may
proceed as described above. Also note that when in the Chan-
nel Select Mode, the previously selected channel may be
redisplayed by entering an invalid channel number (which
includes a blank selection).
Function
Key
Display
Power up
handset
None
Enter metering
mode
To select
power
To select
Rx
To select
Tx
To select
external
To toggle to
decimal display
Numbers read with no
spaces in decimal:
XXX
B
GHI
4
MENU
EXT X XX
TX X XX
RX X XX
PWR X XX
METER
DEF
3
ABC
2
QZ
1
B
Figure 7 - Metering Switches
Various DC voltages may be selected by pressing the
appropriate number without having to back up 1 level
(same as POT selection.)
NOTE
Function
Key
Display
Power up
handset
None
Display Current
channel
To select new
channel
GHI
4
MENU
C SEL X
CHAN X
DEF
3
ABC
2
QZ
1
C
C
Figure 9 - Channel Select Switches
LBI-38599
A-9
