Kenwood TS-780 Instruction Manual

Also see for TS-780: Service manual Instruction manual Instruction manual

0.5 MHz]When the scan, starting from 431.637.5 MHz, reachesthe upper limit 431.987.5 MHz, it jumps down to theower limit 431.500.0 MHz where the scan is startedagain. This action is repeated while holding 0.5 MHzwidth.1 MHz]When the scan reaches from 431.637.5 MHz to theupper limit 431.987.5 MHz, it jumps down to the lowerimit 431.000.0 MHz and reaches 431.987.5 MHz again.This action is repeated while holding 1 MHz width.[3 MHz]Similarly, when the scan reaches from the lower limit431.000.0 MHz to the upper limit 431.637.5 MHz, itjumps down to the lower limit and reaches the upper limitagain. This action is repeated while holding 3 MHz width.The lower limit is 431.637.5 MHz minus the frequencyon 100 kHz order, and the upper limit is 433.987.5 MHz,one step lower than 434.000.0 MHz which is the lowerlimit plus 3 MHz but the scan starts from 431.637.5 MHz.[5 MHz]The upper and lower limits are calculated in the samemanner as for 3 MHz width. The scan is repeated betweenthe lower limit and the upper limit while holding 5 MHzwidth.[10 MHz]The scan is repeated between the upper limit439.987.5 MHz and the lower limit 430.000.0 MHzwhile holding 10 MHz width.430 431432 433 438439 ga+ +f tSCAN 438..250.0 439.987.5‘Wswitch432.987.5S| a a eeeeNote 1: In the SCAN W position 3, 5 or 10, the scan in the144 MHz band is repeated between the upperlimit 145.987.5 MHz and the lower limit144.000.0 MHz.Note 2: In these position, the scan does not shift over the144 and 430 MHz bands. For example, when theSCAN W is 5 in 438.250.0 MHz, the scan is ef-fected holding 5 MHz width.Note 3: The scan width should be calculated even in thefollowing cases:1) When VFO (A, B) is switched.2) When SCAN W switch is set to another posi-tion.3) When BAND switch is depressed.Note 4: The scan width remains unchanged when theSCAN switch is depressed for BUSY stop.To change the scan width, the scan should bereleased.Note 5: The BAND switch can be used during scan opera-tion, but it does not function continuously when itis kept depressed. This switch also functions evenwhen the F. LOCK switch is ON.The scan is released when the PRIO. M, MR or MS switch isset to ON.5-15 USE OF MS (MEMORY SCAN) SWITCHWhen the 144 MS or 430 MS switch is set to ON, thefunction (CH No.) flickers to indicate that the memorychannels (1-10 ch) can be scanned (the squelch thresholdshould be set as in the case of VFO scan).With the 144 MS switch ON, the memory channel for144 MHz band can be scanned. With the 430 MS switchON, the memory channel for the 430 MHz band is scann-ed. When both switches are ON, all the channels (both for144 and 430 MHz bands) are scanned. To hold the scan,use the procedure for VFO scan. To restart the scan, setthe SCAN switch to ON.Note 1: Scan is not effected when the SCAN switch iskept depressed.Note 2: When scan is held in the ON position of both MSswitches, it can be restarted by setting eitherswitch to OFF or by pressing the CALL or MRswitch.Note 3: When all the channels are 144 MHz band and the430 MS switch is set to ON, the function flickersquickly and a oscillation sound is heard con-tinuously. This also occurs when all the channelsare 430 MHz band and the 144 MS switch is setto ON.Note 4: Only memorized channels are scanned.5-16 USE OF PRIO. M CHANNELWith the PRIO. M 9 or 10 switch set to ON, stored fre-quencies in the memory channels 9 or 10 can be recalledwith first priority. In the channel 9 and 10.145.000.0 MHz and 433.000.0 MHz are preset respec-tively, while any frequency can be memorized in eachchannel. Display of the PRIO. M channel is as follows:CisGGGad o « YARGHHGNote: 1 The PRIO. M 9 is prior to the PRIO. M 10.Note: 2 The PRIO. M channel frequency is displayed to100 Hz digit.5-17 BACKUP OF MEMORY CHANNEL FRE-QUENCYAny desired memory channel frequency can be stored inthe RAM (Random Access Memory) of the micro-computer. But the data (frequency) in the RAM is clearedwhen the power switch is set to OFF. The transceiver hasits own built-in backup circuit to hold the data (frequency)even when the power switch is OFF during both AC and DCoperations. By loading backup battery in the transceiverbattery case, the battery power is always supplied to thebackup circuit. In this way, the data is not clearedregardless of the position of the power switch. The backup18