Tektronix 2247A Operator's Manual page 148

Performance Characteristics
Table 6-1 (cont)
Electrical Characteristics
CHARACTERISTICS
Delay Accuracy, A Sweep
Trigger Point to Start of
B Sweep
PERFORMANCE REQUIREMENTS
+(0.5% of reading + 5.0% of one division
of the A Sweep + 25 ns).
COUNTER/TIMER (C/T)
(see formula d
Time Base
Frequency #
Internal Oscillator
Short-term error #
+15°C to +35°C
-10°C to +15°C
and
+35°C to +55°C
Long-term adrift ®
External Oscillator
efinitions at end of this section)
200 MHz.
+1105 (10 ppm).
+5X 105 (50 ppm).
< 2 ppm change per year.
C/T automatically senses the applied
external input signal, determines whether
it Is 1, 5, or 10 MHz (each can be + 2%),
and multiplies it by 200, 40, or 20 respec-
tively to derive the 200 MHz timing signal.
Indication is given in readout when external
tlmebase Is being used.
Frequency
Range
C/T TRIG TIMEOUT
Enabled, or B
Trigger MODE In
AUTO LEVEL?
C/T TRIG TIMEOUT
Disabled, and B
Trigger MODE not
in AUTO LEVEL?
Non-gated Mode
Resolution (Hz)*
Accuracy (Hz)
<4 Hz to > 100 MHz.
0.01 Hz to > 100 MHz.
Displays "< 0.01 Hz" if underranged.
+ 1.4 X TJE X F2 + LSD
N
Resolution +(F X TBE)
"Performance Requirement not checked in manual.
6-12
REV SEP 1989 2247A Operators