Reference - JRC JMA-5312-6 Instruction Manual

III

REFERENCE

Preheat Time after Change of Connection Pattern
After the current interswitch connection pattern has been changed, operation needs to wait until the
system is ready. This is because the preheat time varies depending on the previous connection of
the scanner unit and display unit.
The wait time is necessary for protecting the electronic tubes that emit radio waves.
a) When not changed to a new connection pattern
b) When changed to a new connection pattern and
an scanner unit had been used before the change
c) When changed to a new connection pattern and
an scanner unit had not been used before the change
Notes on Changing Connection Pattern
An attempt to change to another connection pattern immediately after the completion of connection
pattern change may fail.
This is because internal processing still needs some preparation time upon completion of
connection pattern change. Let several seconds pass between connection pattern change
operations.
Notes on Connecting Slave Display Unit
Before a slave display unit can be placed in transmission state, the master display unit must be
placed in transmission state. If the master display unit is moved from the transmission state to the
transmission standby state, the slave display unit is forcibly placed in transmission standby state.
When they are in transmission standby state,
Master Standby is shown in the alarm indication (Brilliance / alarm on page 2-9), and the alarm
sounds.
A slave display unit cannot control tune. Tune is controlled by the master display unit. Slave
is shown in the transmitter pulse length (upper left of the display on page 2-2).
Range change for a slave display unit is limited by the range and pulse length / repetition
frequency of the master display unit. As a rule, a greater range than the range of the master
display unit cannot be set for a slave display unit. However, if the transmitter pulse length of a
slave display unit is identical to the master display unit's and the repetition frequency is within the
master display unit's, a greater range than the master display unit's can be selected for the slave
display unit. When the master display unit narrows the range or changes the transmitter pulse
length, the range of the slave display unit may be forcibly changed. In this case, Master Range
CHG is shown in the alarm indication (Brilliance / alarm on page 2-9), and the alarm sounds.
A-9
: Preheating not required
: Preheating not required
: Preheating required