Goto Section: 27.1232 | 27.1234 | Table of Contents
Revised as of October 1, 2010
Goto Year:2009 |
§ 27.1233 Reimbursement costs of transitioning.
(a) Replacement downconverters. The proponent(s) must install at every
eligible EBS receive site a downconverter designed to minimize the
reception of signals from outside the MBS.
(1) An EBS receive site is eligible to be replaced if:
(i) A reception system was installed at that site on or before the date
the EBS licensee receives its Pre-Transition Data Request (see
(ii) The reception system was installed by or at the direction of the
(iii) The reception system receives EBS programming under § 27.1203(b)
and (c) or is located at a cable television system headend and the
cable system relays educational or instructional programming for an EBS
(iv) It is within the licensee's 35-mile radius GSA.
(2) Replacement downconverters must meet the following minimum
(i) The downconverter's input frequency range (the "in-band
frequencies") must be 2572 MHz to 2614 MHz and output frequency range
must be 294 MHz to 336 MHz;
(ii) The downconversion process must not invert frequencies;
(iii) The nominal gain of the downconverter must be 32 dB, or greater;
(iv) The downconverter must include filtering prior to the first
amplifier that attenuates frequencies below 2500 MHz and above 2705 MHz
by at least 25 dB;
(v) The downconverter must have an out-of-band input 3rd order
intercept point (input IP3) of at least +9 dBm, where out-of-band is
defined as all frequencies below 2566 MHz and all frequencies above
(vi) The downconverter must have a typical noise figure of no greater
than 3.5 dB and a worst case noise figure of no greater than 4.5 dB
across all in-band frequencies and across its entire intended operating
(vii) The downconverter must not introduce a delta group delay of more
than 20 nanoseconds for digital operations or 100 nanoseconds for
analog operations over any individual six megahertz MBS channel.
(b) Migration of Video Programming and Data Transmission Track. (1) The
proponent(s) must provide, at its cost, to each EBS licensee that
intends to continue downstream high-power, high-site educational video
programming or data transmission services, with one programming track
on the MBS channels for each EBS video or data transmission track the
licensee is transmitting on a simultaneous basis before the transition.
(i) To be eligible for migration, a program track must contain EBS
programming that complies with § 27.1203 (b) and (c).
(ii) The proponent(s) must pay only the costs of migrating programming
tracks being transmitted on December 31, 2002 or within six months
(2) The proponent(s) must migrate each eligible programming track to
spectrum in the MBS that will be licensed to the affected licensee at
the conclusion of the transition.
(3) After the transition, the desired-to-undesired signal level ratio
at each of the receive sites securing a replacement downconverter must
satisfy the following criteria:
(i) Cochannel D/U Ratio. (A) When the post-transition desired signal is
transmitted using analog modulation, the actual cochannel D/U ratio
measured at the output of the reception antenna must be at least the
lesser of 45 dB or the actual pre-transmission D/U ratio less 1.5 dB.
(B) When the post-transition desired signal will be transmitted using
digital modulation, the actual cochannel D/U ratio measured at the
output of the reception antenna must be at least the lesser of 32 dB or
the pre-transition D/U ratio less 1.5 dB.
(C) Where in implementing the Transition Plan, the proponent(s) deploys
precise frequency offset in an analog system, the minimum cochannel D/U
ratio is reduced to 38 dB, provided that the transmitters have or are
upgraded pursuant to the Transition Plan to have the appropriate
"plus," "zero," or "minus" 10,010 Hertz precision frequency offset with
a +-3 Hertz (or better) stability.
(ii) Adjacent Channel D/U Ratio. The actual adjacent channel D/U must
equal or exceed the lesser of 0 dB or the actual pre-transmission D/U
ratio. However, in the event that the receive site uses receivers or is
upgraded by the proponent(s) as part of the Transition Plan to use
receivers that can tolerate negative adjacent channel D/U ratios, the
actual adjacent channel D/U ratio at such receive site must equal or
exceed -10 dB. Provided that the receive site receiver is not upgraded
and cannot tolerate -10 dB, the adjacent channel D/U ratio would be
[ 69 FR 72034 , Dec. 10, 2004, as amended at 71 FR 35193 , June 19, 2006]
Goto Section: 27.1232 | 27.1234
Goto Year: 2009 |
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