ie ues the time Beare and Bese the 
speed” recorder amplifier switch is off and its 
set on MANUAL , ae the“high speed” recorder will not 
the antomatie sw: itching unit, é i 
s of the break-circuit chronemeter, which breaks — ¥ 
@ each second except the 59th in each minute, will 
raght-hend gage of the waxed paper tape of the PL P a 
evel recorders and keyed as a 3~KC tone on the magnetic tape } 
greet ; ; 
recorder, i" 
rv the peak of the signal has passed the arrival time . 
pouiate recorders. This is 1 Sen by pressing firmly but n 
ss than one second) on the code switch located just in | 
eae the top sliding drawer of rack three, Pressing 
secondary mars to be made on the time index of the 7 
ae a secondary 3-KC tone signal to be impressed on me 
>, At the moment of pressing the coding switch 
the exact position of the chronometer second hand, : 
ld then be recorded, The exact time of coding should 
pe for future OME 
signal the operator must imncdiately turn’ the magnetic 
on the bettom of Rack 2 or 3 ( Fe aeatline on which ib 
the HOLD position. - -This switches the tape recorder . 
ition and keeps the signal on the tape until the operator Cea 
to the Thigh-spead" graphic level recorder, This «ne 
ie before 2 minutes Boe 15 seconds have elapsed after a 
signal, or the signal will be erased. One revglution “s 
recorder clock Paaee epresents 24 minutes. Note that j 
.L is recorded on the magnetic tape and that normally + 
ously recording end erasing. Note also that the early pers, 
rn al up to'the firing time of the automatic switching unit ee 
ne PL recorder tape, 
iaretice the ete tape recorder on the HOLD 
ation to normal operation by starting the stand-by : 
+, Push the reset button on the automatic switching . ; 
ng oreo can be recorded by the "slow-speed" PL 
he Tessas tape paoraes whose aod 
PL recorder. Turn the 3-KC volume’control 
. 
