TOELLNER TOE 7704 Bedienungsanleitung Seite 28

TTL OUT
TTL resp. HCMOS compatible, output level 0 V / +5 V
typically, short-circuit proof;
t /t ≤ 5 ns; Z approx. 50 , Z
r f OUT
ECL OUT
ECL compatible, output level −0.9 V / −1.8 V typically,
short-circuit proof;
t /t ≤ 2 ns; Z approx. 50 , Z
r f OUT
Variable symmetry
valid for all functions;
continuously settable 10 % ... 90 %
up to 1.2 MHz (TOE 7704, TOE 7706) resp.
up to 2.2 MHz (all other models)
Internal sweep mode
Sweep characteristic
linear/logarithmic; up, down, continuously, triggered,
hold, reset
Frequency range
valid for all functions
1 mHz ... 12 MHz (TOE 7704, TOE 7706) resp.
1 mHz ... 22 MHz (all other models)
Sweep period
1 ms ... 1000 s, resolution 2 digits, deviation 5x10
Sweep width
logarithmic 3 decades max., linear 2 decades max.
OCV OUT output (I/O connector)
Output voltage approx. 0 V (min. start frequency) to
approx. +5 V (max. stop frequency)
Pen-lift outputs
TTL level, PENLIFT active high and PENLIFT
active low when the OCV OUT voltage returns fast to
the start frequency during sweep
Amplifier mode
Gain
approx. 16.5 dB max. (TOE 7704, TOE 7706) resp.
approx. 14 dB max. (all other models)
Accuracy
±5 % typically
Output attenuator
30 dB continuously, additionally 20 dB and 40 dB di-
rectly switchable with fixed attenuator (70 dB max.)
Frequency range
DC up to approx. 12 MHz, harmonic distortion < 0.2 %
to 100 kHz
Input impedance
approx. 10 k , input via EXT IN
DC offset
0 V ... ±10 V, open output; output attenuator 20 dB
and 40 dB directly switchable with fixed attenuator
(40 dB max.)
28
≥ 50
L
≥ 50
L
−4
INVERS
Trigger and gate mode
Frequency range
valid for all functions;
1 mHz ... 12 MHz (TOE 7704, TOE 7706) resp.
1 mHz ... 22 MHz (all other models)
Start phase
−90° ... +90°, continuously settable
Triggering
internally by the means of the built-in sweep generator
with a settable period of 1 ms ... 1000 s and 50 % duty
cycle in gate mode; externally with TTL signal at
EXT IN input and trigger frequency up to 2 MHz;
manually on keys
PLL mode
Frequency range
10 Hz ... 44 MHz; ≥ 22 MHz only pulse, TTL, ECL
Resolution
4½ digits
Frequency deviation
< 2 ppm
Stability
−8
< 5x10 /K, ageing < 2 ppm/year (TCXO accuracy)
Amplitude modulation
Carrier signal
AM internal and external for sine-wave, triangular-wave
and square-wave output functions
Frequency range of carrier
1 mHz ... 22 MHz (TOE 7708A, TOE 7711A)
Internal modulation
Modulation frequency 1 kHz sine wave; modulation
depth 0 % ... 100 %, continuously adjustable
External modulation
Modulation frequency DC ... 500 kHz via EXT IN
input; modulation depth 0 % ... 200 %, continuously
adjustable; modulation voltage 2.5 V for 50 % AM
Frequency counter mode
Frequency range
10 Hz ... 50 MHz, reciprocal counting technique
Resolution
4 digits, automatic range selection
Measuring time
0.5 s
Time base error
−5
< 10 , ageing < 5 ppm/year
Input voltage
TTL level via input EXT IN; input impedance approx.
10 k ; input protection up to 15 V
TOELLNER Electronic Instrumente GmbH
max.
rms