Atec Tektronix-2715 - Manual (Page 3)

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 mat-
ter of editing one of the stan-
dard tables or creating a com-
pletely new table by filling in
a predefined, on-screen chan-
nel-setup form. Your custom
tables can then be transferred
to the 2715 to be used with
its built-in measurement fea-
tures. Result: data will be
consistently taken on all of
your system carriers includ-
ing scrambled channels, aero-
nautical offsets, and non-
standard frequencies.
High-level test sequences –
You can configure automatic
test sequences from the
2715’s built-in measure-
ments. 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 front-
panel selections, or run from
a PC situated at another loca-
tion. 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 auto-
matic execution of any test
sequence. You can also spec-
ify 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 per-
forms its time initiated test
procedures and stores results.
For example, you can leave
the 2715 at a node site
overnight or over the week-
end for unattended monitor-
ing 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 Measure-
ments PC Software in con-
junction 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 signifi-
cantly reduce the number of
field trips necessary to moni-
tor and diagnose system trou-
ble spots. The RF Measure-
ment Software also includes
limits checking, alarming and
271X display transfer
functions.
The demodulated video display aids channel or program identifica-
tion. It also aids trouble-shooting by showing gross picture anoma-
lies, such as the hum bars displayed here.
Measurement conditions and results are clearly displayed on-
screen. 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 perfor-
mance and are dependent on general spec-
trum analyzer specifications. CATV charac-
teristics need not be verified independently
providing that all spectrum analyzer specifi-
cations 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 –7 x 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.