3M DELTA Series - Page 9

imum current 200 ma, saturation volts 0.7V at
200 ma
E, Cue detect open relay contacts available
upon sensing secondary or tertiary cue tones.
Secondary and Tertiary cue detect normally open
relay SPDT'
'Contact ratings — 1A at 25V DC, 0 5A at 100V AC
(resistive)
Initial contact resistance 1 00m ohms maximum at 6
volts, 0.5A
Operate time 5 msec maximum (including contact
bounce, at rated voltage)
Release time 10 msec maximum (including contact
bounce)
Life expectancy — Mechanical: 5x 10 6 operations
minimum
Electrical: 300 x 10 3 operations
minimum
At 25V DC, 1A resistive 200 x 10 3
operations minimum at 100VAC,
0.5A resistive
Not to be used with inductive loads
15. Logging Signals
A Not internal to machine
B. Cue audio input and cue audio output avail 
able for external use.
Cue Audio Input — Source impedance:
10K ohms or less. Volts in.: ,5V +/- 25V RMS @
3.5* kHz
Cue Audio Output — Load impedance:
47K ohms or greater. Volts Out: 500mv +/-
,25V RMS @ 1 kHz, 150 Hz, 3.5 kHz - 8 kHz
•-10 dBm referenced to 0 dBm @ 160 nWb/m
16. Audio Input Level
A -18 dBm to +18 dBm
B. 2 range control straps on record amp: -6
dBm/+6 dBm center-range
C. Front panel potentiometer range 0 to at least
+ 12 dB — referenced to each strap
17. Audio Input Configuration
A Input XFMR is normally supplied for 20K ohm
balanced bridging
B. Strappable for 600 ohms or 150 ohms termi 
nating
C. Electronically balanced bridging 20K ohms
18. Metering (D-IV)/Function Switches
A Front panel switch selection for monitoring
(left to right positions on front panel)
1. Meter Rec — monitor input level to recorder
— switches automatically to "Meter Play"
(monitor output level from playback)
when machine is not set to record
2. Meter Play — Monitor output level
3. 1 kHz Defeat — Prevents the 1 kHz tone
from automatically being recorded on the
cue track when recording. This mode is
indicated when the record set lamp flashes.
4. 1 kHz Add — Places a 1 kHz tone on the
tape for a duration of 0.625 seconds when
the playback is in the run mode. It is not
necessary to hold the 1 kHz record button
depressed for the duration of the tone.
B. Internal Meter Switch — Two position slide
switch on record amp/meter board — acti 
vates only when meter rec and meter play
buttons are in "out" position.
1. Cue play/cue bias — Slide switch in the
"left" position for cue functions and record
bias;
Cue Play — Left Meter
Cue Bias — Right Meter
2. Record Bias — Slide switch in the "right"
position for program bias functions
Left Program Bias — Left Meter
Right Program Bias — Right Meter
19. Bias Amplifier
A 119.3 kHz Bias Frequency, Crystal referenced
20. Tape Capacity
A. NAB sizes A and AA (Delta I & Delta III)
B. NAB sizes A AA B and C (Delta II)
21. Start Time
A Typically 100 milliseconds
(Timing dependent upon solenoid air damp
adjustment)
22. Stop Time
A Audio squelch stop time typically 2 msec —
Tape stop time typically less than 100 msec
B. Tape travel varies according to:
1. Type of cartridge
2. Length of tape
23. Ambient operating temperature range
A 10-50 degrees C (50-122 degrees F)
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