HP 20B manual Key Presses and the Secondary Function Key, Annunciators

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Basic Features

Key Presses and the Secondary Function : Key

To execute the function associated with a key, press and release the desired key. Most of the 20b's keys have two functions: the primary function and the secondary function. The primary function is printed on the top of the key. The secondary function is printed on the bevel of the key. See Figure 2.

Primary

Function

R

Secondary

(shifted) Function

Figure 2 Primary and Secondary Key Functions

To activate the secondary function of a key, press and release :followed by the key with the desired secondary function printed on the bevel. Unlike the shift key on a typewriter or computer keyboard, it is not necessary to press and hold : while pressing another key.

When :is active, the down arrow annunciator appears on screen, indicating that the next key pressed will execute the

secondary function of the key. To cancel an accidental press of :, simply press :a second time.

In this manual, commands using the secondary key functions are represented by the secondary function key symbol, :, followed by the key with the secondary function. For example, to execute sine, press :p. Note how the SIN portion of the key is highlighted, while the 7 is grayed out. This highlighting focuses on the function of the key that will be activated in a given command, and it is used throughout the manual to make the examples easier to follow. Key commands for example problems are provided throughout the text and in tables. Key symbols are placed in the order they are to be pressed, from left to right.

Annunciators

Annunciators are symbols that appear in the display as messages, or after certain keys or key combinations have been pressed. Annunciators are special symbols indicating a specific status in the calculator. Figure 3 illustrates the annunciator symbols in the display.

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Contents HP part number F2219-90201 First edition August HP 20b Business Consultant Financial Calculator ManualRevision History Legal NoticesRevision History Legal NoticesContents Bonds Business ProblemsTime Value of Money Cash FlowsIndex ErrorsWarranty, Regulatory, and Contact Information Keyboard Map Legend FeatureFeature Chapters HP 20b Business Consultant KeyboardSelecting a Language Basic FeaturesAdjusting the Display Contrast Basic FeaturesTwo Line Display Mode Menu Setting PreferencesSetting top line Description Basic Features 1Mode Menu SettingsKeys Display Description Changing the Calculation ModeAnnunciators Key Presses and the Secondary Function Key= Key Using the I and = KeysI Key Memory and the Memory Menu Reset x MenuEditing and Clearing Entries On/CE O Key Accessing Menus and Menu Maps Menu Map for the Break-even Menu Number Entry and Display Mathematical CalculationsMathematical Functions Algebraic Mode Chain ModeRPN Stack Reverse Polish Notation RPN ModeO1c23 I56c1 Last NumberU3I RPN Stack 3I4+5I6+ Mathematical Calculations 2Last NumberKeys Display Description RPN Stack RPN Stack and the Roll Down Operation One-Number Functions and the Math MenuKeys Description Math s MenuMenu Map for the Math Menu Ior = Probability Sub-menuMathematical Calculations 5Math Menu Example 7Inverse Probability Example Two-Number Functions10I 10I 12IStoring and Recalling Numbers Rounding Numbers Recall ArithmeticStoring and Recalling with Time Value of Money TVM Keys Recalling a Menu Item Value in a MenuPage Time Value of Money TVM Keys Time Value of MoneyTime Value of Money Calculating Payments on a Loan 360 N1400 00VMenu Item/Key Description AmortizationTime Value of Money 2TVM Example Creating an Amortization Schedule 10Y1400 00V Interest Conversion Menu Using the Interest Conversion MenuTime Value of Money 6Interest Rate Conversion Example Canadian Mortgages TVM Canada365 Page Canadian Mortgage Example O300N 6Y350 00VCash Flows Cash Flow DiagramCash Flow Amount Cash Flow ExampleKey Description 4000I 80005000I 4500ICash Flows 2Cash Flow Example 115000Analyzing Cash Flows IRR% NPV and IRR Menu ItemsCash Flows 4NPV and IRR Example Editing Cash FlowsSample Cash Flow Diagrams Bond Menu BondsBond Menu Items 20102020 Bond Calculation ExampleBonds 2Bond Calculation Example +L1=Date Calculation Example Date CalculationDate Calculation Menu Date Calculation 1Date Calculation Example 10.3 12010Break-even Menu Break-evenBreak-even 1Break-even Example Percent Calculation Menu Business Problems35I 15I22I 20I30I What is 30% of 80? 4Part % of Total Example80I Depreciation Menu DepreciationDepreciation Method Description Sline 1Depreciation Methods2Depreciation Menu Items Depreciation Menu Items 1000500 Depreciation ExampleDepreciation 3Straight Line Depreciation Example Menu Maps for the Data and Statistics Menus Statistical OperationsData and Stats Menus Menu Item Description Statistical Operations 1The Statistics Menu Items4I1 75I 1I1 50I2I1 65I 3I1 60IStatistical Operations 3Statistics Example 5I1 70I1Error Messages ErrorsError Messages and Calculator Status Error Message Status Replacing the Batteries Warranty, Regulatory, and Contact InformationHP Limited Hardware Warranty and Customer Care Customer Care Ireland 01 605 Italia 02 754 19 210 969Honduras Hong Kong 香港特別行政區 852 India +65 6100Singapore 6100 877 232495 228 01 439Avis Canadien Product Regulatory & Environment InformationModifications Canadian NoticeChemical Substances Pbde Calendar Actual, Cal.360 IndexOff calculator off