Atec Tektronix-2715 - Manual (Page 5)

page 5
2715
Characteristics
Continued Aural Carrier (FREQ/AMPL and ACCUR
AMPL modes)
Difference Range: 0 dB to 30 dB for aural
carrier to noise >15 dB (300 kHz RBW).
Resolution: 0.1 dB.
Accuracy: ±0.75 dB for aural carrier to
noise >15 dB (300 kHz RBW).
Aural Carrier (FAST AMPL mode)
Difference Range: 0 dB to 30 dB for car-
rier to noise >15 dB (300 kHz RBW).
Resolution: 0.3 dB.
Accuracy: ±1.1 dB for carrier to noise
>15 dB (300 kHz RBW).
Analog Channel CTB and CSO –
Measured relative to visual carrier peak
according to NCTA recommendations.
Range and Accuracy for INTERACTIVE and
AUTO modes: See Figures 4, 5, and 6.
Only ±4 dB curve applies to SINGLE SWEEP
and CONTINUOUS modes.
Resolution: 0.3 dB.
Digital Channel CTB and CSO –
Measured relative to the averaged power of
the test channel.
Range and Accuracy: See Figures 7 and 8.
Resolution: 0.3 dB.
Aural (FM) Deviation –
Peak FM deviation is measured for the
selected channel.
Range: 10 kHz to 50 kHz; usable to 80 kHz.
Accuracy: ±4 kHz.
Cross Modulation –
Peak of fundamental component of 3rd order
distortion at horizontal sync frequency (AM)
measured on the unmodulated visual carrier.
Range: 48 dB. For cross modulation levels
below –20 dBc, equivalent frequency
domain measurement of cross modulation
results in a range of 58 dB.
Resolution: 0.1 dB.
Accuracy: ± 2 dB for cross modulation
<36 dB; ±3 dB for cross modulation
<48 dB.
Listen Mode –
Selected channel’s aural carrier is FM
demodulated and output fed to speaker or
headphone jack; instantaneous peak FM
deviation is displayed. If positive polarity
video is selected, then AM audio will be
demodulated.
View Picture Mode – Visual carrier is
demodulated and displayed.
View Modulation (Field) – One video field
of the selected channel’s video is displayed.
View Modulation (Line) –
VITS line displayed; If VITS line isn’t speci-
fied in channel table, line 17 displayed. Line
number user-selectable.
TV Line Selection: Via FREQ/MKRS knob.
Line Format: NTSC or PAL.
Line Range: 1-525 (NTSC); 1-625 (PAL).
Sweep Time: 10 µsec/div.
FREQUENCY RELATED
Frequency Range –
9 kHz to 1800 MHz.
Opt. 50 and 75: 9 kHz to 2150 MHz.
Center Frequency Accuracy – 5x10
–7 of
center frequency ±700 Hz.
Frequency Counter Accuracy – 5x10
–7 of
center frequency ±10 Hz ±1 LSD (least
significant digit).
Dot Marker Frequency Accuracy – Center
frequency accuracy +3% of span, typical.
Frequency Counter Readout Resolu-
tion – 1 Hz or 1 kHz, selectable.
Typical Long-Term Drift – ±2 ppm/year.
Short-Term Drift –
<400 Hz maximum drift between correction
cycles (with SPAN/DIV <20 kHz).
Opt. 50 and 75: <500 Hz above 1.8 GHz.
Residual FM – <100 Hz p-p/20 msec at
<20 kHz span/div
Opt. 50 and 75: <120 Hz above 1.8 GHz.
<2 kHz p-p/20 msec at >20 kHz span/div.
Opt. 50 and 75: <2.4 kHz above 1.8 GHz.
Resolution Bandwidth (–6 dB) –
5 MHz, 1 MHz, 300 kHz, 100 kHz, 30 kHz,
10 kHz, 3 kHz, 1 kHz, and 300 Hz.
RBW Shape Factor (60 dB/6 dB) – <7:1 for
RBW <1 MHz.
Noise Sidebands –
<-70 dBc at 30 x RBW for RBW <100 kHz.
Opt. 50 and 75: <69 dBc above 1.8 GHz.
Video Filter –
Auto:
≈
1/100 of RBW.
-20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
-50
-45
-40
-35
-30
-25
-55
To 500 MHz
500 to 1000 MHz
MEAS
LIM
(dBc)
Input Level dBmV (Single Signal Environment)
ACL Measurement Limits For 2 dB Accuracy
Figure 3.
Figure 4.
Figure 5.
Figure 6.