4-2
FlexNet
®
700 Series Line Extender
Rev F
4
2. Verify that an appropriate
MAIN FUSE
is installed. Table 4.1 lists the appropriate
MAIN
FUSE
values for E7 Line Extenders. Inspect the fuse for visual defects.
■
In E7 Line Extenders with 117V
AC
powering, the
MAIN FUSE
is located in the RFI
filter and must be removed for visual inspection. Refer to
Fuse/Brass Shorting Bar (Slug)
on page 6-1 for removal and installation instructions.
■
All other E7 Line Extenders have a
MAIN FUSE
located in the RF module (see
Figure 2.3 on page 2-4) which can be visually inspected without removing.
3. Check the system map to determine whether the E7 Line Extender requires through
powering. If so, verify that the required fuse, buss bar (slug), or surge terminator is installed
in the
THRU POWER FUSE
location (see Figure 2.3 on page 2-4). Table 4.1 lists the
maximum continuous AC current passing approved for these line extenders.
Voltage Testing
E7 Line Extenders offer four powering options with the following acceptable ranges:
Testing the voltage of a power supply rquires the use of Table 4.3 and Table 4.4. Refer to the
instrucitons that follow based on your particular powering option:
➤
To test a 117V
AC
linear power supply
■
Measure the B+, AC Ripple, and Reverse B+ (if applicable) and compare to the range shown
in Table 4.4:
–
If the measurements are out of the acceptable range, take the appropriate action
shown in Table 4.4.
–
If the measurements are within the acceptable range, record the values on the Data
Sheet located in Appendix E.
Table 4.1 Fusing/Power Passing Considerations
Power Supply
Main Fuse/P.S. Fuse
Maximum Continuous
AC Current Passing
60V Linear
2A, slo-blo
E629 and E729: 10A
All other E7:13A
90 Volt Linear
2A, slo-blo
13A
90 Volt H.E.
6.25A, slo-blo
13A
117 Volt Linear
1A, slo-blo
N/A
Note
: Do not test the voltage at any centerseizure screw in an operating system. Doing
so
may interfere with, or cause the loss of, signal
to the subcriber.
Note
: AC measurements may read up to 10% error if a true-rms meter is not used. AC
ripple measurements cannot be made without an AC-coupled meter.
Table 4.2 AC Test Values
Powering Option
Acceptable Range
60 Volt Linear Power Supply
40-60V
AC
90 Volt Linear Power Supply
60-95V
AC
90 Volt H.E. Power Supply
40-95V
AC
117 V
AC
Linear Power Supply
105-125V
AC
Summary of Contents for FlexNet E7
Page 2: ...Introduction fm Page 10 Monday April 1 2002 12 43 PM...
Page 16: ...1 8 FlexNet 700 Series Line Extender Rev F 1...
Page 26: ...2 10 FlexNet 700 Series Line Extender Rev F 2...
Page 64: ...4 22 FlexNet 700 Series Line Extender Rev F 4...
Page 82: ...A 6 FlexNet 700 Series Line Extender Rev F A...
Page 88: ...B 6 FlexNet 700 Series Line Extender Rev F B...
Page 102: ...C 14 FlexNet 700 Series Line Extender Rev F C...
Page 104: ...D 2 FlexNet 700 Series Line Extender Rev F D...
Page 110: ...Index 4 Rev F...
Page 111: ...Introduction fm Page 10 Monday April 1 2002 12 43 PM...
