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 provides the appropriate abbreviations and
current level. These readings are updated every 2 seconds (see
Figure 8).
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 stations, the Utility Handset can change
the selected channel.
To enter the Channel Select Mode from the main menu,
press the "C" key.
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 Channel Select
Mode, the previously selected channel may be redisplayed by
entering an invalid channel number (which includes a blank
selection).
REMOTE STATION ADJUSTMENTS VIA
MODEM
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 8 - Metering Switches
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
10
