Atec 2715 User Manual

Digital and Analog Testing for Hybrid
Networks

The 2715 Cable TV Spectrum
Analyzer now includes auto­mated tests for both analog
and digitally-modulated
channels. When you are
ready to begin installing
digital transmission of video,
data or voice, the 2715 is
ready to help. After setting
up the 2715 with the new,
companion Cable TV RF
Measurement Software for
Windows, the analyzer auto­matically determines the cor­rect measurements for each
channel type – analog, digi­tal, FM or pilot.

Dependable, In-service Analog
Carrier Measurements at an
Affordable Price

Now you can make more
proof of performance and
other cable system measure­ments without disruption of
service to subscribers. And
you can minimize the incon­venience of making measure­ments at the output of set-top

converters. The 2715 pro­vides accurate and automated
measurement of carrier-to­noise, in-channel response,
and coherent distortion sig­nals as well as carrier levels,
frequencies, and more…with­out removal of video carriers
or modulation. In-service
measurement of CTB requires
an unoccupied channel adja­cent to the test channel.

Characterize your Digital Channels

Channel averaged power,
noise and distortions on digi­tally modulated channels can
all be measured by the 2715.
It’s important to understand
the performance of each of
the digital channels in your
system as well as their inter­action with your analog
channels. Both broadband
random noise-like distor­tions, and coherent distor­tions – plus noise – can be
measured. They all can
degrade the bit-error-rate
behavior of your digital
signals. The 2715 includes

Copyright © 1999 Tektronix, Inc. All rights reserved.

2715
Cable TV Spectrum Analyzer

The 2715 is a complete cable TV RF testing solution.

IN-SERVICE RF TESTING FROM
TEKTRONIX

In-service Measurements Minimize
Program Interruption, Reduce Cost
of Acquiring Performance Data
– Compatible with NTSC and PAL
Systems

Digital Channel Measurements Are
Ready When You Are – Characterize
Averaged Power; Check Noise and
Distortions that Can Worsen BER
– Applicable to QAM, QPSK, QPR,
VSB, and OFDM Signals

Addresses All FCC Proof of
Performance Measurements

Cable TV Measurements Enhance
Measurement Repeatability and
Reduce Technician Training Time

Carrier Level, Carrier Frequency,
Carrier-to-noise, Hum/LFD, and
Other Key Measurements Execute
Automatically from Easy-to-use,
On-screen Menu

Unattended and Remote
Measurement Modes Reduce
Personnel Requirements in the Field

75 Ω Input with Quick-change F and
BNC Connectors Reduce Repair
Costs and Minimize Down Time

Enhanced Troubleshooting Power
with Built-in Preamplifier, Audio and
Video Demodulation – All Standard

Frequency Coverage to 2.15 GHz,
with Options 50 and 75, Can View
Downconverted Satellite Signals
(L-Band)

Includes Windows

™

-compatible PC
Software for Programmed
Measurement Configuration, Data
Collection, Measurement Results
Printouts, Limits Checking,
Alarming and Control of a Locally or
Remotely-located 2715

High Portability, On-board Non­volatile Memory, Four Digital
Displays for Spectral Display
Storage and Comparison, Plus True
Analog, Continuous Gray Scale
Display for Detecting Low Level
Beats and Spurs Amidst Noise and
Active Video

page 2

digital channel averaged
power, desired-to-undesired
signal power ratio (D/U) and
CTB/CSO measurement. You
also can verify the spectral
occupancy of your digital
modulators with an adjacent
channel leakage (ACL) mea­surement. The distortion and
noise measurements require a
brief removal of the digital
signal. You get all this capa­bility in a 23.5 lb., compact,
easy-to-carry package … at an
attractive price. All of the
common cable system spec­tral measurements are built
in and menu-selectable
including those needed to
address field FCC proof of
performance requirements.
An accompanying Microsoft
Windows™-compatible PC
software package adds mea­surement configuration, data
collection, measurement
results printouts, limits
checking, alarming and more.

What used to be complicated
measurement procedures,
even for engineering, are now
push-button simple. Techni­cians can easily perform
extensive cable system analy­sis and data collection in the
field, all automatically.

Measurements and data col­lection can also be done
remotely under computer
control. Or the 2715 can be
left unattended to run auto­matic measurements and data
collection initiated by the
built-in real-time clock. Data
collected in the field can be
transferred from the 2715’s
memory via an RS-232 or
GPIB interface to a PC. The
2715’s accompanying Win­dows PC software package
includes easy transfer of data
to your choice of Windows­compatible spreadsheet or
database programs for cus­tomizing analysis or reports.

Quick, Repeatable, Automated
Measurements

The 2715 contains the follow­ing measurements and capa­bilities in its cable TV
(CATV/APPL) application
menu:

Analog Channels:

• Direct channel tuning and
automatic positioning of
visual and aural carriers

• Visual and aural carrier
level and frequency
measurement

• Survey of system visual
and aural carrier levels and
frequencies

• Depth of modulation adjust­ment and measurement

• Aural carrier FM deviation
adjustment and
measurement

• Visual carrier-to-noise
measurement

• In-channel response
measurement

• Hum/low-frequency distur­bance measurement

• System frequency response

• View baseband modulation
(field and line) and view
picture

• Aural carrier demodulation
(listen mode)

• Intermodulation distortion
measurement (CTB and
CSO)

• Cross modulation
measurement

Digital Channel
Measurements:

(applicable to QAM, QPSK,
QPR, 8VSB and OFDM sig­nals)

• Averaged power

• Desired-to-undesired signal
power ratio (D/U)

• Adjacent channel leakage
(ACL)

• CSO and CTB

• Direct channel tuning and
automatic positioning of
digital signal

• Survey of system digital
channel levels

• System frequency response

Measurements selected from
the menu are automatically
executed, and the results are
displayed on the CRT screen.
Not only are complex mea­surements reduced to push­button simplicity for less­experienced spectrum ana­lyzer users, but measurement
repeatability is high.

A battery pack option makes
2715 measurements and data
collection possible even where
AC power isn’t available.

More Troubleshooting Help...

In addition to automated
measurements, the 2715 also
provides analog channel
video and aural carrier
demodulation. Aural carrier
demodulation allows you to
listen to the program audio
on the selected channel. Sim­ilarly, the demodulated video
feature allows you to view
the video on the currently
selected channel (or from a
down-converted satellite sig­nal). Also, full-field or indi­vidual horizontal line wave­forms can be viewed.

All of these features aid posi­tive channel or program iden­tification in the field. They
also aid recognition of many
system problems.

...And Maintenance Help

Built-in adjustment modes
for audio carrier deviation
and video depth of modula­tion assist in day-to-day
maintenance of your system.
These adjustment modes are
conveniently accessible from
within the automated FM
deviation and depth of modu­lation measurement routines.

Check filters, line amplifiers, cables

The 2715’s 75 Ω External
Tracking Generator (Option

05) provides a convenient
means of measuring fre­quency response on key sys­tem components. You can
also sweep most two-port
devices.

The 2715 capitalizes on PC power

The Microsoft Windows-com­patible software package that
accompanies the 2715 runs
automated cable TV measure­ments via an RS-232 or GPIB
interface and collects mea­surement history for tracking
system performance.

The software package
provides the following
capabilities:

page 3

Channel table generator –

You can create your own
channel tuning tables in
addition to the standard
tables provided. Creating

your own custom channel
tuning tables is a simple mat­ter of editing one of the stan­dard tables or creating a com­pletely new table by filling in
a predefined, on-screen chan­nel-setup form. Your custom
tables can then be transferred
to the 2715 to be used with
its built-in measurement fea­tures. Result: data will be
consistently taken on all of
your system carriers includ­ing scrambled channels, aero­nautical offsets, and non­standard frequencies.

High-level test sequences –

You can configure automatic
test sequences from the
2715’s built-in measure­ments. Creating a test
sequence is a simple matter
of indicating the desired tests
in an on-screen setup matrix

Your test sequences can then
be transferred to the 2715 for
later execution via front­panel selections, or run from
a PC situated at another loca­tion. This capability allows
less experienced technicians
to easily execute high-level
test sequences that have been
defined and loaded into the
2715 by a cable TV system
engineer or senior technician.

Additionally, a time of day
can be specified for auto­matic execution of any test
sequence. You can also spec­ify the number of times that a
test is to be repeated and the
interval of time between test

repetitions. This allows you
to leave the 2715 unattended
while it automatically per­forms its time initiated test
procedures and stores results.
For example, you can leave
the 2715 at a node site
overnight or over the week­end for unattended monitor­ing and data collection.

Labor-saving ancillary
features – Detailed or

summary current or historical
measurement results can be
printed directly from the
2715 PC Software or can be
copied into another Microsoft
Windows-compatible
program for report
customization.

You can execute tests from a
remotely-located 2715 by
using the CATV RF Measure­ments PC Software in con­junction with the Terminal
Program that is a standard
accessory of the Windows
operating system software.
You can place the 2715 at a
node of another remote site
while measurements and data
collection are controlled from
a centrally located PC. This
configuration can signifi­cantly reduce the number of
field trips necessary to moni­tor and diagnose system trou­ble spots. The RF Measure­ment Software also includes
limits checking, alarming and
271X display transfer
functions.

The demodulated video display aids channel or program identifica­tion. It also aids trouble-shooting by showing gross picture anoma­lies, such as the hum bars displayed here.

Measurement conditions and results are clearly displayed on­screen. Text can even be added, to describe measurement location
for example.

2715
Characteristics

The following specifications and features
apply after a 15 minute warmup period and
after all normalizations, including reference
normalizations, have been performed. CATV
characteristics represent typical perfor­mance and are dependent on general spec­trum analyzer specifications. CATV charac­teristics need not be verified independently
providing that all spectrum analyzer specifi­cations are verified.

CABLE TV MEASUREMENTS

Channel Selection –

Visual and aural carriers displayed when
channel number is entered or front-panel
selected.
Tune Configuration: STD, HRC, IRC, and
custom; configured using 2715 PC
software.
Channel Range: 0 to 999; configured using
2715 PC software.
Frequency Range: 1 MHz to 2.15 GHz;
dependent on selected Channel Table.

Visual Carrier Frequency –

Measured with internal counter to 1 Hz

resolution with accuracy of 5x10–7x Carrier
Frequency ±10 Hz ±1 Least Significant
Digit.

Visual-to-Aural Carrier Frequency –

Aural carrier measured with internal counter
relative to visual carrier.
Difference Range: 1 MHz to 10 MHz
(depending on selected channel table) for
an amplitude difference of <30 dB and aural
carrier to noise >15 dB (300 kHz RBW).
Resolution: 1 Hz.
Accuracy: ±15 Hz for visual-to-aural carrier
difference <8 MHz.

Visual Carrier Peak Level –

Absolute peak amplitude measured with
preamp off.
Amplitude Range: –18 dBmV to
+58.8 dBmV for visual carrier to noise
>30 dB (300 kHz RBW) and total input
power <+70 dBmV.
Frequency Range: 15 MHz to 1015 MHz.
Resolution: 0.1 dB.

2715
Characteristics
Continued

page 4

Absolute Accuracy: ±2.5 dB for visual car­rier to noise >30 dB (300 kHz RBW); for FM
signals, carrier to noise >33 dB
(100 kHz RBW).
Relative Accuracy: ±0.5 dB relative to adja­cent channel, ±1.2 dB relative to all others.

Visual-to-Aural Carrier Level Difference –

Difference Range: 0 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).

Digital Channel Averaged Power –

Averaged amplitude measured with
preamp off.
Amplitude range: –30 dBmV to +37 dBmV
(multi-channel) or –30 dBmV to +52 dBmV
(preselected).
Resolution: 0.1 dB.
Absolute accuracy: ±2.5 dB.

Carrier to Noise –

Default noise floor is a normalized 4 MHz
bandwidth measured relative to the visual
carrier peak.
Range and Accuracy: See Figure 1.
Resolution: 0.3 dB.
Gated, in-service measurement is in-band;
non-gated, in-service measurement is at
guard band below channel boundary.

Digital Channel Desired to Undesired
Ratio –

Channel averaged power is divided by total
noise plus distortion power in the channel.
Range and Accuracy: See Figure 2.
Resolution: 0.3 dB.

Modulation Depth –

% AM measured from sync tip to lowest
white level in 10 sweeps (VITS line used if
defined in channel table).
AM Range: 50% to 95%.
Resolution: 0.1%.
Accuracy: ±2% for visual carrier to noise
>40 dB (300 kHz RBW).

Hum/Low-Frequency Disturbance –

Power line frequency measured on an
unmodulated visual carrier and low fre­quency disturbance measured on the
modulated carrier.
AM Range: 1% to 10% peak-to-peak.
Resolution: 0.1%.
Accuracy: ±1% for hum <5% and visual
carrier to noise >25 dB (300 kHz RBW);
±2% for hum <10% and visual carrier to
noise >25 dB (300 kHz RBW).

Frequency Response –

For fixed-amplitude scrambling or no
scrambling, system amplitude variations
(flatness) are displayed relative to a refer­ence trace stored during frequency­response reference setup.
Range: 5 dB/div.
Resolution: 0.2 dB.
Flatness Accuracy: ±0.75 dB.

In-Channel Response –

Expresses maximum variance in amplitude
within some specified frequency range
within a particular channel, given a "flat" test
signal over that same specified range. The
variance is referenced to the average of the
highest and lowest amplitude within the fre­quency range.
Range: ±3 dB.
Resolution: 0.1 dB.
Accuracy: ±0.5 dB.
Test signal line number must be specified
for in-service measurements.

Digital Channel Adjacent Channel
Leakage –

Averaged power in adjacent channel(s) is
divided by averaged power for the test
channel.
Range and Accuracy: See Figure 3.
Resolution: 0.3 dB.

Carrier Survey –

Absolute peak amplitude of each visual car­rier is measured and each associated aural
carrier level is measured relative to the visual
carrier for selected channels. Frequency
counted only in ACCUR FREQ/AMPL mode.
Visual Carrier (FREQ/AMPL and ACCUR
AMPL modes)

Amplitude Range: –18 dBmV to
+58.8 dBmV for visual carrier to noise
>30 dB (300 kHz RBW) and total input
power <+70 dBmV.
Frequency Range: 15 MHz to 1015 MHz.
Resolution: 0.1 dB.
Absolute Accuracy: ±2.5 dB for visual
carrier to noise >30 dB (300 kHz RBW);
for FM signals, carrier to noise >33 dB
(100 kHz RBW).
Relative Accuracy: ±0.5 dB relative to
adjacent channel, ±1.2 dB relative to all
others.

Visual Carrier (FAST AMPL mode)

Amplitude Range: –18 dBmV to +58.8
dBmV for carrier to noise >30 dB (300
kHz RBW) and total input power <+70
dBmV.
Frequency Range: 15 MHz to 1015 MHz.
Resolution: 0.3 dB.
Absolute Accuracy: ±2.7 dB for carrier to
noise >30 dB (300 kHz RBW); for FM
signals, carrier to noise >33 dB
(100 kHz RBW).
Relative Accuracy: ±0.8 dB relative to
adjacent carrier; ±1.5 dB relative to all
other channels.

Figure 1.

Figure 2.

To 500 MHz, using preselector.

500 MHz to 1000 MHz, using preselector.

To 500 MHz, in 60 channel flat system dominated
by analog signals 10 dB stronger than average
power of channel under test.

500 MHz to 1000 MHz, in 60 channel flat system
dominated by analog signals 10 dB stronger than

60
55
50
45

MEAS

LIM

40

(dBc)

35
30
25

-20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
Channel Under Test Input Level dBmV

D/U Measurement Range Limits For 2 dB Accuracy

average power of channel under test.

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 car­rier 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 speci­fied 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 – 5x10–7of
center frequency ±700 Hz.

Frequency Counter Accuracy – 5x10–7of
center frequency ±10 Hz ±1 LSD (least
significant digit).

Dot Marker Frequency Accuracy – Center
frequency accuracy +3% of span, typical.

Frequency Counter Readout Resolu­tion – 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.

page 6

2715
Characteristics
Coninued

Manual: 3 Hz to 300 kHz in 1-3 sequence,
or WIDE.
Off: ≈ RBW.

Frequency Span/Div Range – 100 MHz to
1 kHz selected in 1-2-5 sequence or any
value from 100 MHz to 1 kHz via the keypad
or UTIL menu, plus 180 MHz (MAX SPAN)
and 0 Hz. Opt. 50 and 70: 215 MHz/div
(MAX SPAN).

Span Accuracy – ±3% measured over the
center eight divisions.

AMPLITUDE RELATED

Flatness –

±2 dB (relative to reference level at
100 MHz) measured with 10 dB internal RF
attenuation (preamp off).
Opt. 50 and 75: ±3 dB above 1.8 GHz.

Vertical Display Modes – 10, 5, 1 dB/div,
Linear.

Measurement Range – -90 dBmV (preamp
on) to +68.8 dBmV (–139 to +20 dBm).

Display Dynamic Range –

80 dB maximum (Log Mode); 8 divisions
maximum (Linear mode).
Opt. 50 and 75: Dynamic range reduced if
there is signal energy at or near 2.11 GHz.
Baseline will typically rise to within 10 to
20 dB of signal applied near 2.11 GHz.

Reference Level Range –

Log Mode: –21.2 dBmV to +68.8 dBmV
(–70 to +20 dBm); –41.2 dBmV to
+48.8 dBmV with preamp on.
Linear Mode: 10.83 µV/div to 342.33 mV/div
(1.08 µV/div to 34.23 mV/div with
preamp on).

Reference Level Steps –

Log Mode: 1 dB or 10 dB.
Linear Mode: 10.83 µV/div to 342.33 mV/div
in 1-2-5 sequence; >0.2 div/increment with
FINE REF LVL STEP activated.

Display Amplitude Accuracy –

10 dB/div: ±1.0 dB/10 dB to a maximum
cumulative error of ± 2.0 dB over the 70 dB
range and a maximum cumulative error of
± 4.0 dB over the 80 dB range; accuracy and
range specifications are affected by the SNR
of selected RBW and are valid only for the
maximum specified in the following table:

RBW dB Down

5 MHz 40
1 MHz 40
300 kHz 50
100 kHz 50
30 kHz 60
10 kHz 60
3 kHz 80
1 kHz 80
300 Hz 80
5 dB/div: ±1.0 dB/10 dB to a maximum cumu-

lative error of ±2.0 dB over the 40 dB range.
1 dB/div: ±1 dB maximum error over the
8 dB range.
Linear Mode: ±5% of full scale.

RF Attenuation Range – 0 to 50 dB in 2 dB
steps.

Maximum Sensitivity (at 300 Hz RBW) –

-78 dBmV (–127 dBm); –90 dBmV

(–139 dBm) with preamp on.

SPURIOUS RESPONSE (PREAMP OFF)

Residual Spurious Response –

<-51 dBmV (<-100 dBm) with 0 dB RF
attenuation, except at 1780 MHz where the
spurious response is <-41 dBmV
(<-90 dBm).
Opt. 50 and 75: <-26 dBmV (–75 dBm) at

2.0 GHz.

3rd Order IM Distortion –

<-70 dBc from any two on-screen signals
with any frequency span.
Opt. 50 and 75: typically <65 dBc at

2.15 GHz.
2nd Harmonic Distortion – <-66 dBc mea-

sured with 1st mixer input level of
<+9 dBmV.

LO Emission –

<-21 dBmV (<-70 dBm) with 0 dB RF
attenuation.
Opt. 50 and 75: <-21 dBmV (<70 dBm)
(sweep above 350 MHz).
<+29 dBmV, typical (–20 dBm) (sweep
below 90 MHz).

0 Hz Spur – <+39 dBmV (<-10 dBm) refer­ence to input with 0 dB RF attenuation.

INPUT RELATED

RF Input –

75 Ω BNC with quick change to 75 Ω type F
connector.
Opt. 50: 50 Ω Type N connector.

VSWR –

With RF Attenuation >10 dB: 1.5:1 maxi­mum to 1 GHz.
With 0 dB RF Attenuation: 2:1 maximum to
1 GHz.

Maximum Safe Input – +70 dBmV (0.1 W
or 2.2 V) continuous peak with 100 VDC
blocking capacitor.

1 dB Compression Point – >+34 dBmV
(–15 dBm) with 0 RF attenuation and 1st
mixer at +19 dBmV (–30 dBm).

SWEEP RELATED

Sweep Selections – Normal, single sweep,

and manual scan.

-60

-55

-50

-45

-40

-35

-65

MEAS

LIM

(dBc)

-20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55
Input Level dBmV

Digital Signal CTB Measurement Range Limit For 2 dB Accuracy

To 500 MHz, using preselector.

500 MHz to 1000 MHz, using

To 500 MHz, in 60 channel flat system dominated
by analog signals 10 dB stronger than average
power of channel under test.

500 MHz to 1000 MHz, in 60 channel flat system
dominated by analog signals 10 dB stronger than
average power of channel under test.

Figure 7.

-50

-45

-40

-35

-30

-25

-55

MEAS

LIM

(dBc)

-20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55
Input Level dBmV

Digital Signal CSO Measurement Range Limit For 2 dB Accuracy

-60

To 500 MHz, using preselector.

500 MHz to 1000 MHz, using

To 500 MHz, in 60 channel flat system dominated
by analog signals 10 dB stronger than average
power of channel under test.

500 MHz to 1000 MHz, in 60 channel flat system
dominated by analog signals 10 dB stronger than
average power of channel under test.

Figure 8.

2715
Characteristics
Coninued

page 7

Sweep Times – 1 µsec/div to 2 sec/div in a
1-2-5 sequence.

Sweep Accuracy – ±10% over the center 8
divisions.

Trigger – Free run, internal, external, line,
TV line, and TV field.

Trigger Amplitude –

Internal: One division or more of signal.
External: 100 mV peak minimum; DC cou­pled (15 Hz to 1 MHz).

OTHER INPUTS/OUTPUTS

External Trigger – BNC connector, 10 kΩ

impedance, DC coupled, 0.1 µsec minimum
pulse width; 50 V (DC + pk AC) maximum.

External Video Input – 100 Ω impedance
DC coupled; 0-50 kHz BW; 0-1.6 V
(200 mV/div typical) signal input for vertical
deflection of CRT beam.

Video Output – 0-1.6 V of video signal,
inversely proportional to vertical display
amplitude; 0 V is top of screen; 1 kΩ
impedance.

Sweep Gate Out – TTL level that is HI while
CRT beam sweeps.

Sweep Output – +1.3 to –1.3 V, negative­going ramp, proportional to the horizontal
sweep; output impedance <50 Ω.

Digital Communications – Either RS-232 or
GPIB interface provided as a no-cost option.

ENVIRONMENTAL

Temperature –

Operating: 0° to +50°C (MIL T-28800E).
Nonoperating: –55° to +75°C.

Humidity – Nonoperating: Five cycles
(120 hrs) in accordance with MIL-Std­28800E, Class 5.

Vibration – Meets MIL T-28800E, Method
514, Procedure X (modified).

Shock – Operating and nonoperating: Three
guillotine-type shocks of 30 g, one-half
sine, 11 ms duration each direction along
each major axis; total of 18 shocks.

Altitude –

Operating: 15,000 ft.
Nonoperating: 50,000 ft.

Electromagnetic Compatibility –

EC92 EMC Directive 89/336/EEC:
Emissions:

EN50081-1.
Radiated emissions, 30 MHz to 1 GHz:
EN55022 Class B (CISPR 22 B).
Conducted emissions, 150 kHz to
30 MHz: EN55022 Class B (CISPR 22 B).
Conducted emissions, power line har­monics, 0 to 2 kHz: IEC 555-213.

Immunity:

EN50082-1.Electrostatic discharge, 8 kV,
IEC 801-2.
Radiated immunity, 27 MHz to 500 MHz,
IEC 801-3.
No response above –90 dBm in a
3 V/meter field.
Fast transients, capacitive clamp, 1 kV
power leads, 500 V control leads, IEC

801-4.
Power line surge, 1 kV differential mode,
2 kV common mode, IEC 801-5.

GENERAL CHARACTERISTICS

Power Requirements – 105 W maximum

(1.4 A) at 115 V, 60 Hz; operates 48 Hz to
440 Hz, 90 to 132 VAC, or 48 Hz to 63 Hz,
90 VAC to 250 VAC; battery power option
available.

Dimensions (H,W,D) with Feet, Handle, and
Front-Panel Cover

mm in.

137 x 361 x 445 5.4 x 14.2 x 17.5

Weight kg lbs.

<10.6 23.5

OTHER CAPABILITIES

Markers – Single marker/delta marker; next

right, next left peaks; next lower, next
higher peaks; (highest) peak find; marker to
center frequency; select start/stop frequen­cies; transpose ∆ markers.

Measurement Modes – Noise, carrier-to­noise, bandwidth (user-definable "dB down"
points), 99% occupied bandwidth, signal
search, and cable TV measurements (see
Cable TV).

Time Delay Setup – Uses built-in
time-of-day clock to initiate measurement
sequences and sequence repeat interval;
START TIME, REPEAT INTERVAL, RUN N
TIMES.

PC-Based Software Package – Provides
report generation, test data analysis, data
history, channel tuning table definition,
user-defined program definition, limits
checking, alarming and 271X display
transfer.

Nonvolatile Memory –

Lithium battery backup, 124 K available;
used to save cable TV measurement results,
setup table parameters, large user-definable
key routines, antenna tables, and channel
tuning tables.
Saved Displays: 108 maximum.
Saved Front-Panel Setups: 36 maximum.

Digital Storage Display – Selectable acqui­sition modes of positive peak only, positive/
negative peak; SAVE A, B, C, and active D
trace; up to four traces on screen; MAX
HOLD A, B; MIN HOLD C; B, C minus A;
TITLE MODE; digital storage off provides
analog display.

Ensemble Averaging – Provides weighted
averaging of display, results in reduction of
measured noise values and impulse signals.

Internal Preamp – Preamp can be switched
in/out of circuit (degrades flatness above
600 MHz, provides a maximum of 12 dB
sensitivity improvement).

Alternate Reference Level Units – dBm,
dBmV, dBV, dBµV, dBµW, dBµV/m (dBmV
and dBµV only in CATV measurement
mode).

dBµV/m Mode – Automatically compen­sated field strength measurement with up to
five user-selected antennas.

User-Definable Power-On Status – Instru­ment powers up to user-definable state or
supplied default settings.

Center Measure – Signal nearest center fre­quency is centered with frequency and peak
amplitude automatically read out (not a
marker mode); the centered signal is
counted.

Signal Track – Drifting signal is kept at dis­play center with correct frequency and peak
amplitude displayed.

Direct Plot/Print – Supports Epson FX and
LQ Series compatible Printers using RS-232
interface, or HPGL compatible plotters via
GPIB interface.

2715
Ordering
Information

2715

Cable TV Spectrum Analyzer.
Includes: Windows-compatible PC Soft-

ware, Power Cord (U.S. 115 V/60 Hz), User
Manual, Programmer Manual, Reference
Manual, Front Cover, 75 Ω BNC Connector,
75 Ω F Connector, and Choice of GPIB or
RS-232 Interface (Opt. 03 or Opt. 08). Opt.
50 includes a 50 Ω Type N-to-BNC adapter
in place of 75 Ω connectors.

Options

Opt. 03 – Provides an IEEE-488 General

Purpose Interface Bus (GPIB) as a no-cost
option (not compatible with Option 08).

Opt. 05 – 100 kHz-1.8 GHz 75 Ω External
Tracking Generator with mechanical mating
kit (includes Opt. 15). Cannot be mounted
to 2715 simultaneously with Option 07
Battery Pack.

Opt. 07 – Battery Pack/Inverter.
Opt. 08 – Provides an RS-232 port as a no-

cost option (not compatible with Opt. 03).
Opt. 15 – 1st Local Oscillator Output for a

1405 TV Sideband Analyzer or 2707 Exter­nal Tracking Generator.

Opt. 30 – Rackmount Adapter for
19 x 5.25-in. Rack Dimensions.

Opt. 33 – Travel Line package
Includes: Rain Cover, Accessory Pouch,

Gray Filter, and Carrying Strap.
Opt. 34 – Portable-to-rackmount Adapter

for 19 x 7-in. Rack Dimensions.
Opt. 50 – Frequency extension to 2.15 GHz,

50 Ω input impedence with Type N
connector.

Opt. 75 – Frequency extension to 2.15 GHz,
75 Ω BNC with quick change to 75 Ω Type
F connector.

International Power Plug Options

Opt. A1 – Universal Euro 220 V, 50 Hz.
Opt. A2 – UK 240 V, 50 Hz.
Opt. A3 – Australian 240 V, 50 Hz.
Opt. A4 – North American 240 V, 60 Hz.
Opt. A5 – Switzerland 220 V, 50 Hz.

Measurement Service Options

Opt. C3 – Three years of Calibration

Services.

Opt. C5 – Five years of Calibration Services.
Opt. D3 – Test Data (requires Opt. C3).
Opt. D5 – Test Data (requires Opt. C5).
Opt. R3 – Repair warranty extended to

cover three years.
Opt. R5 – Repair warranty extended to

cover five years.

Optional Accessories

75 Ω Coaxial Cable, BNC, 24 in. – Order

012-1339-00.
75 Ω Coaxial Cable, BNC, 42 in. – Order

12-0074-00.

F Series Input Adapter/Connector
Replacement – Order 103-0301-00.

BNC Input Adapter/Connector Replace­ment – Order 103-0310-00.

RS-232 Cables –

9-pin to 9-pin Null Modem. Order
012-1379-00.

25-pin to 9-pin Null Modem. Order
012-1380-00.

25-pin to 9-pin RS-232 Cable. Order
012-1214-00.

GPIB Cables –

1 meter. Order 012-0991-01.
2 meter. Order 012-0630-01.

Rain Cover – Order 200-2500-00.
Accessory Pouch – Order 016-0677-02.
Viewing Hoods –

Collapsible. Order 016-0592-00.
Polarized. Order 016-0180-00.
Binocular. Order 016-0566-00.

Carrying Strap – Order 346-0199-00.
CRT Light Filter (Gray) – Order

337-2775-02.

Transit Case – Order 016-0792-02.
Front Panel Cover – 200-2520-00.
Softside Carrying – Case 016-1158-01.
Service Manual – 070-9096-00.
User Manual – 070-9115-00.

2712, 2711 Option 03 comply with IEEE
Standard 488.1-1987, and with Tektronix
Standard Codes and Formats.

5/99 HB/XBS 2EW-10432-4

Copyright © 1998, Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this
publication supersedes that in all previously published material. Specification and price change privileges reserved. TEKTRONIX and TEK are registered
trademarks of Tektronix, Inc. All other trade names referenced are the service marks, trademarks or registered trademarks of their respective companies.

For further information, contact Tektronix:

Worldwide Web: for the most up-to-date product information visit our web site at: www.tektronix.com
ASEAN Countries (65) 356-3900; Australia & New Zealand 61 (2) 9888-0100; Austria, Central Eastern Europe, Greece, Turkey, Malta,& Cyprus [phone]; Belgium [phone];

Brazil and South America 55 (11) 3741-8360; Canada 1 [phone]; Denmark [phone];Finland [phone]; France & North Africa [phone]; Germany + 49 (221) 94 77 400;
Hong Kong (852) 2585-6688; India (91) 80-2275577; Italy [phone];Japan (Sony/Tektronix Corporation) 81 (3) 3448-3111; Mexico, Central America, & Caribbean 52 (5) 666-6333;
The Netherlands [phone]; Norway [phone]; People’s Republic of China 86 (10) 6235 1230; Republic of Korea 82 (2) 528-5299; South Africa (27 11)651-5222; Spain & Portugal [phone];
Sweden [phone]; Switzerland [phone]; Taiwan 886 (2) 2722-9622; United Kingdom & Eire [phone]; USA 1 [phone].

From other areas, contact: Tektronix, Inc. Export Sales, P.O. Box 500, M/S 50-255, Beaverton, Oregon 97077-0001, USA 1 [phone].