Model 11869A Manual Backdating ChangesSECTION VIIMANUAL BACKDATING CHANGES7-1. INTRODUCTION7-2. This manual has been written for and applies directly toinstruments with serial numbers prefixed as indicated on the titlepage. Earlier versions of the instrument {serial numbers prefixedlower than the ones indicated on the title page) may be slightlydifferent in design or appearance. The purpose of this section of themanual is to document these differences.7-3. With the information provided in this section, this manual canbe corrected so that it applies to any earlier version orconfiguration of the instrument. Later versions of the instrument(serial numbers prefixed higher than the ones indicated on the titlepage) will be documented in a yellow Manual Changes supplement.7-4. To adapt this manual to an earlier instrument, refer to Table7-1 and make all of.the manual backdating changes listed oppositeyour instrument serial number or serial number prefix. Perform thesechanges in the alphabetical sequence listed.7-5, For additional important information about serial numbercoverage, refer to INSTRUMENTS COVERED BY THE MANUAL in Section I.Table 7-1. Manual Backdating Changes by Serial Number PrefixSerial Prefix Make Manual Changes2142A & 2203A A2140A A and B2115A A, B, and C2105A A, B, C, and D7-6. MANUAL CHANGE INSTRUCTIONSCHANGE APage 1-0, Figure 1-1:Replace the photograph of the 11869A RF Plug-In Adapterwith the 1X869A RF Plug-In Adapter (CHANGE A) photograph in thissection.7-1